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โค2๐Ÿคฉ1๐Ÿ’ฏ1๐Ÿ˜˜1
Chemistry booster series
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๐Ÿ’ฏ4โค2๐Ÿ•Š1๐Ÿ˜1
1๏ธโƒฃ #MOLECULARORBITALTHEORY
๐Ÿ“Œ Molecular Orbital Theory (MOT) explains bonding, bond order and magnetic nature of molecules.
๐Ÿ“Œ Proposed by Hund and Mulliken.


2๏ธโƒฃ #BASICIDEA
โœ”๏ธ Atomic orbitals of bonded atoms combine to form molecular orbitals
โœ”๏ธ Molecular orbitals belong to the entire molecule
โœ”๏ธ Number of MOs formed = number of AOs combined


3๏ธโƒฃ #CONDITIONSFORCOMBINATION
โœ”๏ธ Comparable energy of AOs
โœ”๏ธ Proper orientation
โœ”๏ธ Significant overlap


4๏ธโƒฃ #TYPESOFMOLECULARORBITALS
โœ”๏ธ Bonding MO
โœ”๏ธ Antibonding MO
โœ”๏ธ Non-bonding MO (rare in diatomic molecules)


5๏ธโƒฃ #BONDINGMO
โœ”๏ธ Formed by constructive overlap
โœ”๏ธ Lower energy than AOs
โœ”๏ธ Increases stability
๐Ÿ“Œ Denoted by: ฯƒ, ฯ€


6๏ธโƒฃ #ANTIBONDINGMO
โœ”๏ธ Formed by destructive overlap
โœ”๏ธ Higher energy
โœ”๏ธ Decreases stability
๐Ÿ“Œ Denoted by: ฯƒ*, ฯ€*


7๏ธโƒฃ #ELECTRONFILLINGRULES
โœ”๏ธ Aufbau principle
โœ”๏ธ Pauli exclusion principle
โœ”๏ธ Hundโ€™s rule of maximum multiplicity


8๏ธโƒฃ #ENERGYORDEROFDIATOMICMOLECULES โญ
๐Ÿ“Œ For Bโ‚‚, Cโ‚‚, Nโ‚‚:
ฯƒ1s < ฯƒ1s < ฯƒ2s < ฯƒ2s < ฯ€2p < ฯƒ2p < ฯ€2p < ฯƒ2p
๐Ÿ“Œ For Oโ‚‚, Fโ‚‚, Neโ‚‚:
ฯƒ1s < ฯƒ1s < ฯƒ2s < ฯƒ2s < ฯƒ2p < ฯ€2p < ฯ€2p < ฯƒ2p


9๏ธโƒฃ #BONORDER (VERY IMP )
๐Ÿ“Œ Formula:
Bond order = (Nb โˆ’ Na) / 2
โœ”๏ธ Nb = bonding electrons
โœ”๏ธ Na = antibonding electrons
๐Ÿ“Œ Interpretation:
โœ”๏ธ Higher bond order โ†’ stronger bond
โœ”๏ธ Bond order = 0 โ†’ molecule does not exist


๐Ÿ”Ÿ #MAGNETICNATURE
โœ”๏ธ Unpaired electrons โ†’ paramagnetic
โœ”๏ธ All electrons paired โ†’ diamagnetic
๐Ÿ“Œ Example:
โœ”๏ธ Oโ‚‚ โ†’ paramagnetic
โœ”๏ธ Nโ‚‚ โ†’ diamagnetic


1๏ธโƒฃ1๏ธโƒฃ #IMPORTANTEXAMPLES (NEET ๐Ÿ”ฅ)
โœ”๏ธ Hโ‚‚ โ†’ bond order = 1
โœ”๏ธ Heโ‚‚ โ†’ bond order = 0 (does not exist)
โœ”๏ธ Oโ‚‚โบ โ†’ bond order increases
โœ”๏ธ Oโ‚‚โป โ†’ bond order decreases


1๏ธโƒฃ2๏ธโƒฃ #LIMITATIONSOFMOT
โœ”๏ธ Complex for polyatomic molecules
โœ”๏ธ Does not explain shape clearly


1๏ธโƒฃ3๏ธโƒฃ #NEETIMPORTANTPOINTS
โœ”๏ธ MOT explains paramagnetism of Oโ‚‚
โœ”๏ธ Energy order changes after Nโ‚‚
โœ”๏ธ Bond order decides stability


1๏ธโƒฃ4๏ธโƒฃ #ONELINEREVISION
Molecular Orbital Theory explains bonding by delocalised molecular orbitals and predicts bond order and magnetic nature

@Ayano1me @Neetugpoll @Neetugquiz
๐Ÿฅฐ2โค1๐Ÿ’ฏ1
1๏ธโƒฃ #VALENCEBONDTHEORY
๐Ÿ“Œ Valence Bond Theory (VBT) explains formation of covalent bonds by overlap of atomic orbitals.
๐Ÿ“Œ Proposed by Heitler and London.


2๏ธโƒฃ #BASICIDEA
โœ”๏ธ Atoms bond to achieve stable electronic configuration
โœ”๏ธ Half-filled atomic orbitals overlap
โœ”๏ธ Electrons pair with opposite spins
๐Ÿ“Œ Greater overlap โ†’ stronger bond


3๏ธโƒฃ #CONDITIONSFOROVERLAP
โœ”๏ธ Half-filled orbitals
โœ”๏ธ Comparable energy of orbitals
โœ”๏ธ Proper orientation


4๏ธโƒฃ #TYPESOFOBOND
โœ”๏ธ Sigma (ฯƒ) bond
โœ”๏ธ Pi (ฯ€) bond


5๏ธโƒฃ #SIGMABOND
โœ”๏ธ Formed by head-on overlap
โœ”๏ธ Stronger than ฯ€ bond
โœ”๏ธ Electron density along internuclear axis
๐Ÿ“Œ Overlap types:
โœ”๏ธ sโ€“s
โœ”๏ธ sโ€“p
โœ”๏ธ pโ€“p


6๏ธโƒฃ #PIBOND
โœ”๏ธ Formed by sidewise overlap
โœ”๏ธ Weaker than ฯƒ bond
โœ”๏ธ Electron density above & below axis
๐Ÿ“Œ Formed by pโ€“p overlap only


7๏ธโƒฃ #HYBRIDISATION
๐Ÿ“Œ Mixing of atomic orbitals of similar energy to form hybrid orbitals.
โœ”๏ธ Number of hybrid orbitals = number of AOs mixed


8๏ธโƒฃ #TYPESOFHYBRIDISATION
โœ”๏ธ sp โ†’ linear โ†’ 180ยฐ โ†’ BeClโ‚‚
โœ”๏ธ spยฒ โ†’ trigonal planar โ†’ 120ยฐ โ†’ BFโ‚ƒ
โœ”๏ธ spยณ โ†’ tetrahedral โ†’ 109.5ยฐ โ†’ CHโ‚„
โœ”๏ธ dspยฒ โ†’ square planar โ†’ [Ni(CN)โ‚„]ยฒโป
โœ”๏ธ dยฒspยณ โ†’ octahedral โ†’ [Co(NHโ‚ƒ)โ‚†]ยณโบ


9๏ธโƒฃ #VALENCEBONDTHEORYINCOORDINATIONCOMPOUNDS
โœ”๏ธ Central metal provides empty orbitals
โœ”๏ธ Ligands donate lone pair
โœ”๏ธ Coordinate bond formed by overlap


๐Ÿ”Ÿ #MAGNETICNATURE
โœ”๏ธ Unpaired electrons โ†’ paramagnetic
โœ”๏ธ Paired electrons โ†’ diamagnetic
๐Ÿ“Œ Example:
โœ”๏ธ [Ni(CN)โ‚„]ยฒโป โ†’ diamagnetic
โœ”๏ธ [NiClโ‚„]ยฒโป โ†’ paramagnetic


1๏ธโƒฃ1๏ธโƒฃ #LIMITATIONSOFVBT
โœ”๏ธ Cannot explain colour of compounds
โœ”๏ธ Cannot explain strong vs weak ligands clearly
โœ”๏ธ No quantitative explanation of spectra


1๏ธโƒฃ2๏ธโƒฃ #NEETIMPORTANTPOINTS
โœ”๏ธ ฯƒ bond is stronger than ฯ€ bond
โœ”๏ธ Multiple bonds = 1 ฯƒ + remaining ฯ€
โœ”๏ธ Hybridisation explains geometry


1๏ธโƒฃ3๏ธโƒฃ #ONELINEREVISION
Valence Bond Theory explains bonding by orbital overlap and predicts bond type, strength and geometry.

@Ayano1me @Neetugpoll @Neetugquiz
๐Ÿ”ฅ2๐Ÿ†1๐Ÿ™ˆ1
Q1.
Assertion (A): In Oโ‚‚ molecule, two electrons remain unpaired in molecular orbitals.
Reason (R): The last electrons of Oโ‚‚ occupy degenerate ฯ€* antibonding orbitals according to Hundโ€™s rule.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q2.
Assertion (A): Bond order of Nโ‚‚ molecule is 3.
Reason (R): Nโ‚‚ has more electrons in bonding molecular orbitals than in antibonding molecular orbitals.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true



Q3.
Assertion (A): Heโ‚‚ molecule does not exist.
Reason (R): Number of electrons in bonding and antibonding orbitals of Heโ‚‚ are equal.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q1.
Assertion (A): According to VBT, a covalent bond is formed by overlap of half-filled atomic orbitals.
Reason (R): Overlap of orbitals increases electron density between two nuclei.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q2.
Assertion (A): A ฯƒ-bond is stronger than a ฯ€-bond.
Reason (R): ฯƒ-bond is formed by head-on overlap whereas ฯ€-bond is formed by sidewise overlap.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true



Q3.
Assertion (A): Valence Bond Theory cannot explain paramagnetism of Oโ‚‚ molecule.
Reason (R): VBT does not consider molecular orbitals and electron delocalisation.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true
โค1๐Ÿ‘1๐Ÿณ1๐Ÿ†1
๐Ÿ‘1๐Ÿ”ฅ1๐Ÿ‘Œ1๐Ÿ’ฏ1
1๏ธโƒฃ #KINETICTHEORYOFGASES
โœ”๏ธ Explains macroscopic properties of gases
โœ”๏ธ Based on molecular motion
โœ”๏ธ Applies mainly to ideal gases


2๏ธโƒฃ #BASICPOSTULATES
โœ”๏ธ Gas consists of very large number of molecules
โœ”๏ธ Molecules are point masses (negligible volume)
โœ”๏ธ Distance between molecules โ‰ซ molecular size
โœ”๏ธ Molecules move randomly in all directions


3๏ธโƒฃ #NATUREOFMOLECULARMOTION
โœ”๏ธ Continuous
โœ”๏ธ Random
โœ”๏ธ Straight-line motion between collisions
๐Ÿ“Œ Velocity constantly changes due to collisions


4๏ธโƒฃ #INTERMOLECULARFORCES
โœ”๏ธ Negligible attractive forces
โœ”๏ธ No repulsion except during collision
๐Ÿ“Œ Valid only for ideal gases


5๏ธโƒฃ #COLLISIONS (VERY IMP ๐Ÿ”ฅ)
โœ”๏ธ Collisions are perfectly elastic
โœ”๏ธ Occur between:
โ–ช๏ธ Moleculeโ€“molecule
โ–ช๏ธ Moleculeโ€“wall
๐Ÿ“Œ No loss of kinetic energy


6๏ธโƒฃ #PRESSUREOFGAS
โœ”๏ธ Due to collision of gas molecules with container walls
โœ”๏ธ More collisions โ†’ more pressure
๐Ÿ“Œ Pressure โˆ number of collisions


7๏ธโƒฃ #KINETICENERGY
โœ”๏ธ Average kinetic energy depends only on temperature
โœ”๏ธ Independent of pressure & volume
๐Ÿ“Œ Formula:
Average K.E. = (3/2) kT (per molecule)
Average K.E. = (3/2) RT (per mole)


8๏ธโƒฃ #TEMPERATURESIGNIFICANCE
โœ”๏ธ Measure of average kinetic energy
โœ”๏ธ At 0 K โ†’ molecular motion stops (ideal case)
๐Ÿ“Œ Higher T โ†’ higher molecular speed


9๏ธโƒฃ #SPEEDOFGASMOLECULES
โœ”๏ธ Three types:
โ–ช๏ธ Most probable speed (vโ‚š)
โ–ช๏ธ Average speed (vโ‚แตฅ)
โ–ช๏ธ RMS speed (vแตฃโ‚˜โ‚›)
๐Ÿ“Œ Relation:
vโ‚š < vโ‚แตฅ < vแตฃโ‚˜โ‚›


๐Ÿ”Ÿ #SPEEDFORMULAE (NEET FAVORITE โค๏ธ)
โœ”๏ธ vโ‚š = โˆš(2RT / M)
โœ”๏ธ vโ‚แตฅ = โˆš(8RT / ฯ€M)
โœ”๏ธ vแตฃโ‚˜โ‚› = โˆš(3RT / M)
๐Ÿ“Œ M in kg molโปยน


1๏ธโƒฃ1๏ธโƒฃ #GRAHAMLAW (LINKED CONCEPT)
โœ”๏ธ Rate โˆ 1 / โˆšM
โœ”๏ธ Lighter gas diffuses faster


1๏ธโƒฃ2๏ธโƒฃ #DEVIATIONFROMIDEALBEHAVIOUR
โœ”๏ธ Real gases deviate at:
โ–ช๏ธ High pressure
โ–ช๏ธ Low temperature
๐Ÿ“Œ Cause:
โœ”๏ธ Finite molecular volume
โœ”๏ธ Intermolecular attraction


1๏ธโƒฃ3๏ธโƒฃ #LIMITATIONSOFKTG
โŒ Cannot explain liquefaction
โŒ Fails at high pressure
โŒ Assumes zero molecular volume


1๏ธโƒฃ4๏ธโƒฃ #NEETONELINERS
โœ”๏ธ Pressure independent of mass of gas
โœ”๏ธ KE โˆ absolute temperature
โœ”๏ธ Elastic collision = KE conserved
โœ”๏ธ At same T โ†’ all gases have same average KE

@Ayano1me @Neetugpoll @Neetugquiz
โค2๐Ÿคฉ1๐Ÿ˜1
Q1.
Assertion (A): Average kinetic energy of gas molecules is directly proportional to absolute temperature.
Reason (R): Increase in temperature increases the speed of gas molecules.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q2.
Assertion (A): At constant temperature, pressure of a gas is inversely proportional to volume.
Reason (R): Number of collisions of gas molecules with container walls increases when volume decreases.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Assertion (A): Root mean square (rms) speed of gas molecules depends on the nature of gas.
Reason (R): rms speed is inversely proportional to the square root of molar mass.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true
๐Ÿ’ฏ2โค1๐Ÿ”ฅ1
1๏ธโƒฃ #THERMODYNAMICS
โœ”๏ธ Branch of chemistry dealing with energy changes
โœ”๏ธ Studies relation between heat, work & energy
โœ”๏ธ Does NOT tell rate or mechanism of reaction


2๏ธโƒฃ #THERMODYNAMICSYSTEM
โœ”๏ธ Part of universe under study
๐Ÿ“Œ Types:
โœ”๏ธ Open system โ†’ exchanges mass + energy
โœ”๏ธ Closed system โ†’ exchanges only energy
โœ”๏ธ Isolated system โ†’ no exchange


3๏ธโƒฃ #SURROUNDINGS
โœ”๏ธ Rest of universe except system
๐Ÿ“Œ Universe = System + Surroundings


4๏ธโƒฃ #STATEFUNCTION
โœ”๏ธ Depends only on initial & final state
โœ”๏ธ Path independent
๐Ÿ“Œ Examples:
โœ”๏ธ Internal energy (U)
โœ”๏ธ Enthalpy (H)
โœ”๏ธ Entropy (S)


5๏ธโƒฃ #PATHFUNCTION
โœ”๏ธ Depends on path followed
๐Ÿ“Œ Examples:
โœ”๏ธ Heat (q)
โœ”๏ธ Work (w)


6๏ธโƒฃ #ZEROTHLAWOFTHERMODYNAMICS
โœ”๏ธ If A is in thermal equilibrium with B
โœ”๏ธ And B is in thermal equilibrium with C
โœ”๏ธ Then A is also in thermal equilibrium with C
๐Ÿ“Œ Basis of temperature measurement


7๏ธโƒฃ #FIRSTLAWOFTHERMODYNAMICS (VERY IMP )
โœ”๏ธ Law of conservation of energy
โœ”๏ธ Energy cannot be created or destroyed
๐Ÿ“Œ Mathematical form:
ฮ”U = q + w
โœ”๏ธ ฮ”U = change in internal energy
โœ”๏ธ q = heat absorbed by system
โœ”๏ธ w = work done on system


8๏ธโƒฃ #SIGNCONVENTION (NEET โš ๏ธ)
โœ”๏ธ Heat absorbed โ†’ q = +ve
โœ”๏ธ Heat released โ†’ q = โ€“ve
โœ”๏ธ Work done on system โ†’ w = +ve
โœ”๏ธ Work done by system โ†’ w = โ€“ve


9๏ธโƒฃ #WORKDONEINGASEXPANSION
โœ”๏ธ w = โ€“Pฮ”V
๐Ÿ“Œ Expansion (ฮ”V +ve) โ†’ w โ€“ve
๐Ÿ“Œ Compression (ฮ”V โ€“ve) โ†’ w +ve


๐Ÿ”Ÿ #SPECIALCASES
โœ”๏ธ At constant volume
w = 0
ฮ”U = q
โœ”๏ธ At constant pressure
qโ‚š = ฮ”H


1๏ธโƒฃ1๏ธโƒฃ #ENTHALPY
โœ”๏ธ Heat content of system
โœ”๏ธ H = U + PV
๐Ÿ“Œ Change in enthalpy:
ฮ”H = ฮ”U + ฮ”(PV)


1๏ธโƒฃ2๏ธโƒฃ #SECONDLAWOFTHERMODYNAMICS
โœ”๏ธ Natural processes occur in direction of increase in entropy
โœ”๏ธ Total entropy of universe always increases
๐Ÿ“Œ ฮ”S(universe) > 0 โ†’ spontaneous
๐Ÿ“Œ ฮ”S(universe) = 0 โ†’ equilibrium


1๏ธโƒฃ3๏ธโƒฃ #ENTROPY
โœ”๏ธ Measure of randomness or disorder
โœ”๏ธ Higher disorder โ†’ higher entropy
๐Ÿ“Œ Solid < Liquid < Gas


1๏ธโƒฃ4๏ธโƒฃ #GIBBSFREEENERGY ( IMPORTANT )
โœ”๏ธ G = H โ€“ TS
๐Ÿ“Œ Change in Gibbs energy:
ฮ”G = ฮ”H โ€“ Tฮ”S
โœ”๏ธ ฮ”G < 0 โ†’ spontaneous
โœ”๏ธ ฮ”G = 0 โ†’ equilibrium
โœ”๏ธ ฮ”G > 0 โ†’ non-spontaneous


1๏ธโƒฃ5๏ธโƒฃ #THIRDLAWOFTHERMODYNAMICS
โœ”๏ธ Entropy of perfectly crystalline solid at 0 K is zero
๐Ÿ“Œ S = 0 at 0 K


1๏ธโƒฃ6๏ธโƒฃ #NEETONELINERS
โœ”๏ธ Internal energy is state function
โœ”๏ธ Heat & work are path functions
โœ”๏ธ First law is special case of energy conservation
โœ”๏ธ Entropy predicts spontaneity
โœ”๏ธ Gibbs energy decides feasibility

@Ayano1me @Neetugpoll @Neetugquiz
๐Ÿ”ฅ2โค1๐Ÿ•Š1๐Ÿ†1
Q1. Zeroth Law
Assertion (A): If two systems are separately in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
Reason (R): All systems in thermal equilibrium have the same temperature.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q2. First Law
Assertion (A): Internal energy of an isolated system remains constant.
Reason (R): Energy can neither be created nor destroyed, only converted from one form to another.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true



Q3. Second Law
Assertion (A): Heat cannot spontaneously flow from a colder body to a hotter body.
Reason (R): Total entropy of an isolated system always increases for a spontaneous process.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true


Q4. Third Law
Assertion (A): Entropy of a perfectly crystalline substance is zero at absolute zero temperature.
Reason (R): At absolute zero, only one microstate is possible.
(1) A & R both true and R is correct explanation
(2) A & R both true but R is not correct explanation
(3) A true, R false
(4) A false, R true
๐Ÿคฉ3โค1๐Ÿณ1
โญ ๐—–๐—œ๐—˜ ๐—ชEE (๐——๐—ก, ๐——๐—, ๐— ๐— ๐—ฆ๐—ง๐—”๐—ฅ, ๐— ๐—ž๐—š & so on) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ข๐—Ÿ๐—— ๐—Ÿ๐—˜๐—–๐—ง๐—จ๐—ฅ๐—˜๐—ฆ โ€” ๐—จ๐—ก๐——๐— ๐—ฌ + ๐—Ÿ๐—ก ๐—ž@๐—ง๐—” + ๐—ฆ@๐—ฉ@๐—  + ๐—ข๐—ง๐—›๐—˜๐—ฅ ๐—ง๐—ข๐—ฃ ๐—ง๐—˜๐—”๐—–๐—›๐—˜๐—ฅ๐—ฆ

โญ ๐—จ๐—ก๐——๐— ๐—ฌ (๐—ง๐—ก๐— , ๐—ฅ๐——, ๐—ฌ๐—ฆ๐—ฌ, ๐—”๐—–๐—œ๐——, ๐—ฆ๐—ง ๐—ฆ๐—œ๐—ฅ, ๐—œ๐—ก๐—ฆ๐—”๐—™ ๐—”๐—Ÿ๐—œ ๐—ฆ๐—œ๐—ฅ & So On ) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ฆ@๐—ฉ@๐—  (๐—”๐—š ๐—ฆ๐—œ๐—ฅ, ๐—”๐—ฆ๐—›๐—œ๐—ฆ๐—› ๐—•๐—”๐—๐—ฃ๐—˜๐—ฌ๐—œ ๐—ฆ๐—œ๐—ฅ, ๐—ฃ๐—”๐—ฅ๐—ฉ๐—˜๐—ญ ๐—ž๐—›๐—”๐—ก, ๐—ฉ๐—ž
๐—ฆ๐—œ๐—ฅ & ๐—ฆ๐—ข ๐—ข๐—ก) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ


โญ ๐—–๐—ข๐—ฃ๐—ฌ๐—ฅ๐—œ๐—š๐—›๐—ง ๐—•๐—”๐—–๐—ž๐—จ๐—ฃ ๐—ข๐—™ ๐—”๐—Ÿ๐—Ÿ ๐—ข๐—™ ๐—ง๐—›๐—œ๐—ฆ
๐Ÿ˜2๐Ÿ•Š1
Chemistry booster series
โญ ๐—–๐—œ๐—˜ ๐—ชEE (๐——๐—ก, ๐——๐—, ๐— ๐— ๐—ฆ๐—ง๐—”๐—ฅ, ๐— ๐—ž๐—š & so on) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ โญ ๐—ข๐—Ÿ๐—— ๐—Ÿ๐—˜๐—–๐—ง๐—จ๐—ฅ๐—˜๐—ฆ โ€” ๐—จ๐—ก๐——๐— ๐—ฌ + ๐—Ÿ๐—ก ๐—ž@๐—ง๐—” + ๐—ฆ@๐—ฉ@๐—  + ๐—ข๐—ง๐—›๐—˜๐—ฅ ๐—ง๐—ข๐—ฃ ๐—ง๐—˜๐—”๐—–๐—›๐—˜๐—ฅ๐—ฆ โญ ๐—จ๐—ก๐——๐— ๐—ฌ (๐—ง๐—ก๐— , ๐—ฅ๐——, ๐—ฌ๐—ฆ๐—ฌ, ๐—”๐—–๐—œ๐——, ๐—ฆ๐—ง ๐—ฆ๐—œ๐—ฅ, ๐—œ๐—ก๐—ฆ๐—”๐—™ ๐—”๐—Ÿ๐—œ ๐—ฆ๐—œ๐—ฅ & So On ) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ โญ ๐—ฆ@๐—ฉ@๐—  (๐—”๐—š ๐—ฆ๐—œ๐—ฅ, ๐—”๐—ฆ๐—›๐—œ๐—ฆ๐—› ๐—•๐—”๐—๐—ฃ๐—˜๐—ฌ๐—œ ๐—ฆ๐—œ๐—ฅ, ๐—ฃ๐—”๐—ฅ๐—ฉ๐—˜๐—ญ ๐—ž๐—›๐—”๐—ก, ๐—ฉ๐—ž ๐—ฆ๐—œ๐—ฅ & ๐—ฆ๐—ข ๐—ข๐—ก) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ โญ ๐—–๐—ข๐—ฃ๐—ฌ๐—ฅ๐—œ๐—š๐—›๐—งโ€ฆ
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๐ŸŽ‰1๐Ÿ•Š1๐Ÿณ1
1๏ธโƒฃ #GIBBSFREEENERGY
โœ”๏ธ Thermodynamic state function
โœ”๏ธ Determines spontaneity of process
โœ”๏ธ Denoted by G
๐Ÿ“Œ Relation:
G = H โˆ’ TS


2๏ธโƒฃ #TERMSINFORMULA
โœ”๏ธ H โ†’ Enthalpy
โœ”๏ธ T โ†’ Absolute temperature (K)
โœ”๏ธ S โ†’ Entropy
๐Ÿ“Œ Unit of G โ†’ Joule


3๏ธโƒฃ #CHANGEINGIBBSENERGY
๐Ÿ“Œ Formula:
ฮ”G = ฮ”H โˆ’ Tฮ”S
โœ”๏ธ Applies at constant T & P


4๏ธโƒฃ #SIGNIFICANCEOFฮ”G (VERY IMP )
โœ”๏ธ ฮ”G < 0 โ†’ Spontaneous process
โœ”๏ธ ฮ”G = 0 โ†’ Equilibrium
โœ”๏ธ ฮ”G > 0 โ†’ Non-spontaneous


5๏ธโƒฃ #CASESBASEDONฮ”HANDฮ”S
โœ”๏ธ ฮ”H < 0 and ฮ”S > 0
Process spontaneous at all temperatures
โœ”๏ธ ฮ”H > 0 and ฮ”S < 0
Process non-spontaneous at all temperatures
โœ”๏ธ ฮ”H < 0 and ฮ”S < 0
Spontaneous at low temperature
โœ”๏ธ ฮ”H > 0 and ฮ”S > 0
Spontaneous at high temperature


6๏ธโƒฃ #TEMPERATUREEFFECT
โœ”๏ธ Increase in T increases importance of entropy term
โœ”๏ธ Tฮ”S dominates at high temperature


7๏ธโƒฃ #GIBBSENERGYATEQUILIBRIUM
โœ”๏ธ At equilibrium:
ฮ”G = 0
๐Ÿ“Œ Relation with equilibrium constant:
ฮ”Gยฐ = โˆ’RT ln K


8๏ธโƒฃ #STANDARDGIBBSFREEENERGY
โœ”๏ธ Measured at:
โœ”๏ธ 1 bar pressure
โœ”๏ธ 298 K temperature
๐Ÿ“Œ Formula:
ฮ”Gยฐ = ฮ”Hยฐ โˆ’ Tฮ”Sยฐ


9๏ธโƒฃ #REACTIONQUOTIENTRELATION
๐Ÿ“Œ Formula:
ฮ”G = ฮ”Gยฐ + RT ln Q
โœ”๏ธ Q = reaction quotient
๐Ÿ“Œ At equilibrium Q = K


๐Ÿ”Ÿ #MAXIMUMWORKCONCEPT
โœ”๏ธ ฮ”G gives maximum non-expansion work
โœ”๏ธ Useful in electrochemistry
๐Ÿ“Œ Electrical work = โˆ’ฮ”G


1๏ธโƒฃ1๏ธโƒฃ #GIBBSENERGYINELECTROCHEMISTRY
๐Ÿ“Œ Relation:
ฮ”Gยฐ = โˆ’nFEยฐ
โœ”๏ธ n = number of electrons
โœ”๏ธ F = Faraday constant
โœ”๏ธ Eยฐ = standard emf


1๏ธโƒฃ2๏ธโƒฃ #UNITSOFฮ”G
โœ”๏ธ Joule
โœ”๏ธ kJ molโปยน (mostly used in chemistry)


1๏ธโƒฃ3๏ธโƒฃ #NEET
โœ”๏ธ ฮ”G decides feasibility, not rate
โœ”๏ธ Spontaneous โ‰  fast
โœ”๏ธ ฮ”G depends on T, P & composition
โœ”๏ธ ฮ”G is state function


1๏ธโƒฃ4๏ธโƒฃ #ONELINEREVISION
โœ”๏ธ Gibbs free energy predicts spontaneity
โœ”๏ธ ฮ”G = 0 at equilibrium
โœ”๏ธ Negative ฮ”G โ†’ feasible process
โœ”๏ธ ฮ”Gยฐ related to K and Eยฐ
๐Ÿ”ฅ2๐Ÿ‘1๐Ÿ˜1
โญ ๐—–๐—œ๐—˜ ๐—ชEE ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐——๐—ก, ๐——๐—, ๐— ๐— ๐—ฆ๐—ง๐—”๐—ฅ, ๐— ๐—ž๐—š & so on) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ข๐—Ÿ๐—— ๐—Ÿ๐—˜๐—–๐—ง๐—จ๐—ฅ๐—˜๐—ฆ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜โ€” ๐—จ๐—ก๐——๐— ๐—ฌ + ๐—Ÿ๐—ก ๐—ž@๐—ง๐—” + ๐—ฆ@๐—ฉ@๐—  + ๐—ข๐—ง๐—›๐—˜๐—ฅ ๐—ง๐—ข๐—ฃ ๐—ง๐—˜๐—”๐—–๐—›๐—˜๐—ฅ๐—ฆ

โญ ๐—จ๐—ก๐——๐— ๐—ฌ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐—ง๐—ก๐— , ๐—ฅ๐——, ๐—ฌ๐—ฆ๐—ฌ, ๐—”๐—–๐—œ๐——, ๐—ฆ๐—ง ๐—ฆ๐—œ๐—ฅ, ๐—œ๐—ก๐—ฆ๐—”๐—™ ๐—”๐—Ÿ๐—œ ๐—ฆ๐—œ๐—ฅ & So On ) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ฆ@๐—ฉ@๐—  ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜(๐—”๐—š ๐—ฆ๐—œ๐—ฅ, ๐—”๐—ฆ๐—›๐—œ๐—ฆ๐—› ๐—•๐—”๐—๐—ฃ๐—˜๐—ฌ๐—œ ๐—ฆ๐—œ๐—ฅ, ๐—ฃ๐—”๐—ฅ๐—ฉ๐—˜๐—ญ ๐—ž๐—›๐—”๐—ก, ๐—ฉ๐—ž
๐—ฆ๐—œ๐—ฅ & ๐—ฆ๐—ข ๐—ข๐—ก) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ


โญ ๐—–๐—ข๐—ฃ๐—ฌ๐—ฅ๐—œ๐—š๐—›๐—ง ๐—•๐—”๐—–๐—ž๐—จ๐—ฃ ๐—ข๐—™ ๐—”๐—Ÿ๐—Ÿ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ ๐—ข๐—™ ๐—ง๐—›๐—œ๐—ฆ
โค1๐Ÿ”ฅ1๐Ÿ‘1
Chemistry booster series
โญ ๐—–๐—œ๐—˜ ๐—ชEE ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐——๐—ก, ๐——๐—, ๐— ๐— ๐—ฆ๐—ง๐—”๐—ฅ, ๐— ๐—ž๐—š & so on) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ โญ ๐—ข๐—Ÿ๐—— ๐—Ÿ๐—˜๐—–๐—ง๐—จ๐—ฅ๐—˜๐—ฆ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜โ€” ๐—จ๐—ก๐——๐— ๐—ฌ + ๐—Ÿ๐—ก ๐—ž@๐—ง๐—” + ๐—ฆ@๐—ฉ@๐—  + ๐—ข๐—ง๐—›๐—˜๐—ฅ ๐—ง๐—ข๐—ฃ ๐—ง๐—˜๐—”๐—–๐—›๐—˜๐—ฅ๐—ฆ โญ ๐—จ๐—ก๐——๐— ๐—ฌ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐—ง๐—ก๐— , ๐—ฅ๐——, ๐—ฌ๐—ฆ๐—ฌ, ๐—”๐—–๐—œ๐——, ๐—ฆ๐—ง ๐—ฆ๐—œ๐—ฅ, ๐—œ๐—ก๐—ฆ๐—”๐—™ ๐—”๐—Ÿ๐—œ ๐—ฆ๐—œ๐—ฅ & So On ) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ โญ ๐—ฆ@๐—ฉ@๐—  ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜(๐—”๐—š ๐—ฆ๐—œ๐—ฅ, ๐—”๐—ฆ๐—›๐—œ๐—ฆ๐—› ๐—•๐—”๐—๐—ฃ๐—˜๐—ฌ๐—œโ€ฆ
Join kr lena all bcz in sbke full lec + crash course+ handwriting notes +short notes + test  All in one milega
Haar batch ka even more then batch content
โค1๐Ÿคฉ1๐Ÿ†1
Q1.
Assertion (A): For a spontaneous process at constant temperature and pressure, ฮ”G is negative.
Reason (R): Spontaneous processes occur with decrease in Gibbs free energy.
Options:
(1) A & R true, R correct explanation
(2) A & R true, R not explanation
(3) A true, R false
(4) A false, R true


Q2.
Assertion (A): When ฮ”G = 0, the system is at equilibrium.
Reason (R): At equilibrium, forward and backward reaction rates are equal


Q3.
Assertion (A): A reaction with ฮ”H < 0 and ฮ”S < 0 is spontaneous at all temperatures.
Reason (R): Decrease in enthalpy always favours spontaneity.



Q5. (Numerical concept)
Assertion (A): If ฮ”H = โˆ’40 kJ and ฮ”S = โˆ’100 J Kโปยน, reaction is spontaneous at low temperature.
Reason (R): Negative ฮ”S disfavors spontaneity at high temperature
๐Ÿ•Š1๐Ÿ˜1๐Ÿณ1
๐ŸŽ‰1๐Ÿ•Š1๐Ÿ’ฏ1
โญ ๐—–๐—œ๐—˜ ๐—ชEE ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐——๐—ก, ๐——๐—, ๐— ๐— ๐—ฆ๐—ง๐—”๐—ฅ, ๐— ๐—ž๐—š & so on) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ข๐—Ÿ๐—— ๐—Ÿ๐—˜๐—–๐—ง๐—จ๐—ฅ๐—˜๐—ฆ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜โ€” ๐—จ๐—ก๐——๐— ๐—ฌ + ๐—Ÿ๐—ก ๐—ž@๐—ง๐—” + ๐—ฆ@๐—ฉ@๐—  + ๐—ข๐—ง๐—›๐—˜๐—ฅ ๐—ง๐—ข๐—ฃ ๐—ง๐—˜๐—”๐—–๐—›๐—˜๐—ฅ๐—ฆ

โญ ๐—จ๐—ก๐——๐— ๐—ฌ ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ (๐—ง๐—ก๐— , ๐—ฅ๐——, ๐—ฌ๐—ฆ๐—ฌ, ๐—”๐—–๐—œ๐——, ๐—ฆ๐—ง ๐—ฆ๐—œ๐—ฅ, ๐—œ๐—ก๐—ฆ๐—”๐—™ ๐—”๐—Ÿ๐—œ ๐—ฆ๐—œ๐—ฅ & So On ) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ

โญ ๐—ฆ@๐—ฉ@๐—  ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜(๐—”๐—š ๐—ฆ๐—œ๐—ฅ, ๐—”๐—ฆ๐—›๐—œ๐—ฆ๐—› ๐—•๐—”๐—๐—ฃ๐—˜๐—ฌ๐—œ ๐—ฆ๐—œ๐—ฅ, ๐—ฃ๐—”๐—ฅ๐—ฉ๐—˜๐—ญ ๐—ž๐—›๐—”๐—ก, ๐—ฉ๐—ž
๐—ฆ๐—œ๐—ฅ & ๐—ฆ๐—ข ๐—ข๐—ก) ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฒ


โญ ๐—–๐—ข๐—ฃ๐—ฌ๐—ฅ๐—œ๐—š๐—›๐—ง ๐—•๐—”๐—–๐—ž๐—จ๐—ฃ ๐—ข๐—™ ๐—”๐—Ÿ๐—Ÿ๐——๐—ฅ๐—˜๐—”๐—  ๐—™๐—ข๐—ฅ๐—š๐—˜ ๐—ข๐—™ ๐—ง๐—›๐—œ๐—ฆ
โค2๐Ÿ”ฅ1๐Ÿ™1
Chemistry booster series
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โคโ€๐Ÿ”ฅ4โค2๐Ÿฅฐ1
1๏ธโƒฃ #CHEMICALEQUILIBRIUM
โœ”๏ธ State where forward & reverse reactions occur at same rate
โœ”๏ธ Concentrations of reactants & products become constant
๐Ÿ“Œ Example:
Nโ‚‚ + 3Hโ‚‚ โ‡Œ 2NHโ‚ƒ


2๏ธโƒฃ #EQUILIBRIUMCONSTANT (K)
โœ”๏ธ Ratio of product concentrations to reactant concentrations
โœ”๏ธ Each raised to power of stoichiometric coefficient
๐Ÿ“Œ General reaction:
aA + bB โ‡Œ cC + dD
๐Ÿ“Œ Expression:
Kc = [C]แถœ[D]แตˆ / [A]แตƒ[B]แต‡


3๏ธโƒฃ #TYPESOFEQUILIBRIUMCONSTANT
โœ”๏ธ Kc โ†’ concentration based
โœ”๏ธ Kp โ†’ partial pressure based
๐Ÿ“Œ Relation:
Kp = Kc(RT)โฟ
โœ”๏ธ n = moles of gaseous products โˆ’ moles of gaseous reactants


4๏ธโƒฃ #SIGNIFICANCEOFK
โœ”๏ธ Predicts extent of reaction
โœ”๏ธ Tells position of equilibrium
๐Ÿ“Œ Values:
โœ”๏ธ K โ‰ซ 1 โ†’ Product favoured
โœ”๏ธ K โ‰ช 1 โ†’ Reactant favoured
โœ”๏ธ K โ‰ˆ 1 โ†’ Both present


5๏ธโƒฃ #REACTIONQUOTIENT (Q)
โœ”๏ธ Same expression as K
โœ”๏ธ Calculated at any stage of reaction
๐Ÿ“Œ Comparison:
โœ”๏ธ Q < K โ†’ reaction proceeds forward
โœ”๏ธ Q > K โ†’ reaction proceeds backward
โœ”๏ธ Q = K โ†’ equilibrium


6๏ธโƒฃ #APPLICATION1DIRECTIONOFREACTION
โœ”๏ธ Compare Q with K
โœ”๏ธ Predict spontaneous direction
๐Ÿ“Œ Very important for numericals


7๏ธโƒฃ #APPLICATION2DEGREEOFDISSOCIATION
โœ”๏ธ Used for weak electrolytes
๐Ÿ“Œ Example:
HA โ‡Œ Hโบ + Aโป
K = ฮฑยฒC / (1 โˆ’ ฮฑ)
โœ”๏ธ ฮฑ = degree of dissociation
โœ”๏ธ C = initial concentration


8๏ธโƒฃ #APPLICATION3IONIZATIONOFWEAKELECTROLYTES
โœ”๏ธ Acids & bases have small K value
๐Ÿ“Œ Example:
CHโ‚ƒCOOH โ‡Œ Hโบ + CHโ‚ƒCOOโป
โœ”๏ธ Small K โ†’ weak acid


9๏ธโƒฃ #APPLICATION4CALCULATIONOFCONCENTRATION
โœ”๏ธ Find unknown equilibrium concentration
โœ”๏ธ Used in ICE table method
๐Ÿ“Œ Steps:
โœ”๏ธ Initial concentration
โœ”๏ธ Change
โœ”๏ธ Equilibrium


๐Ÿ”Ÿ #APPLICATION5EFFECTOFCHANGINGCONDITIONS
โœ”๏ธ Temperature change affects K
โœ”๏ธ Concentration & pressure do NOT change K
๐Ÿ“Œ Only temperature changes K value


1๏ธโƒฃ1๏ธโƒฃ #EFFECTOFTEMPERATURE
โœ”๏ธ Endothermic reaction:
Temperature โ†‘ โ†’ K โ†‘
โœ”๏ธ Exothermic reaction:
Temperature โ†‘ โ†’ K โ†“


1๏ธโƒฃ2๏ธโƒฃ #RELATIONWITHGIBBSFREEENERGY
๐Ÿ“Œ Formula:
ฮ”Gยฐ = โˆ’RT ln K
โœ”๏ธ ฮ”Gยฐ < 0 โ†’ K > 1 (spontaneous)
โœ”๏ธ ฮ”Gยฐ > 0 โ†’ K < 1


1๏ธโƒฃ3๏ธโƒฃ #HETEROGENEOUSEQUILIBRIUM
โœ”๏ธ Solids & liquids not included in K
๐Ÿ“Œ Example:
CaCOโ‚ƒ(s) โ‡Œ CaO(s) + COโ‚‚(g)
Kp = P(COโ‚‚)


1๏ธโƒฃ4๏ธโƒฃ #REVERSINGREACTION
โœ”๏ธ K(reverse) = 1 / K(forward)


1๏ธโƒฃ5๏ธโƒฃ #MULTIPLYINGREACTION
โœ”๏ธ If reaction multiplied by n
โœ”๏ธ New K = Kโฟ


1๏ธโƒฃ6๏ธโƒฃ #NEETโš ๏ธ
โœ”๏ธ K depends only on temperature
โœ”๏ธ Catalyst does not change K
โœ”๏ธ Pure solids not included
โœ”๏ธ Units of K depend on reaction


1๏ธโƒฃ7๏ธโƒฃ #ONELINEREVISION
โœ”๏ธ K predicts extent of reaction
โœ”๏ธ Q vs K gives direction
โœ”๏ธ Only temperature affects K
โœ”๏ธ Kpโ€“Kc relation important
โค3๐Ÿ‘2๐Ÿ‘Œ2๐Ÿ’ฏ1
โƒฃ #SOLUBILITYPRODUCT
โœ”๏ธ Solubility product = product of molar concentrations of ions in saturated solution
โœ”๏ธ Each concentration raised to power of its stoichiometric coefficient
๐Ÿ“Œ For salt: Aโ‚“Bแตง
Ksp = [Aโบ]หฃ [Bโป]สธ


2๏ธโƒฃ #CONDITIONOFAPPLICABILITY
โœ”๏ธ Salt must be sparingly soluble
โœ”๏ธ Solution must be saturated
โœ”๏ธ At constant temperature

.
3๏ธโƒฃ #IONICDISSOCIATION
โœ”๏ธ AB(s) โ‡Œ Aโบ + Bโป
โœ”๏ธ Aโ‚‚B(s) โ‡Œ 2Aโบ + Bยฒโป
โœ”๏ธ ABโ‚‚(s) โ‡Œ Aโบ + 2Bโป
.

4๏ธโƒฃ #MOLARSOLUBILITY (S)
โœ”๏ธ Molar solubility = moles dissolved per litre to form saturated solution
๐Ÿ“Œ Units: mol Lโปยน


โญโญ5๏ธโƒฃ #KspINTERMSSOLUBILITY (VERY IMP )

5๏ธโƒฃ1๏ธโƒฃ For AB
AB โ‡Œ Aโบ + Bโป
Ksp = Sยฒ
S = โˆšKsp

5๏ธโƒฃ2๏ธโƒฃ For Aโ‚‚B
Aโ‚‚B โ‡Œ 2Aโบ + Bยฒโป
Ksp = (2S)ยฒ(S) = 4Sยณ
S = (Ksp / 4)ยนแŸยณ

5๏ธโƒฃ3๏ธโƒฃ For ABโ‚‚
ABโ‚‚ โ‡Œ Aโบ + 2Bโป
Ksp = S(2S)ยฒ = 4Sยณ
S = (Ksp / 4)ยนแŸยณ

5๏ธโƒฃ4๏ธโƒฃ For Aโ‚ƒB
Aโ‚ƒB โ‡Œ 3Aโบ + Bยณโป
Ksp = (3S)ยณ(S) = 27Sโด


6๏ธโƒฃ #IONICPRODUCT (IP)
โœ”๏ธ IP = product of ionic concentrations at any instant
๐Ÿ“Œ Comparison:
โœ”๏ธ IP < Ksp โ†’ Unsaturated
โœ”๏ธ IP = Ksp โ†’ Saturated
โœ”๏ธ IP > Ksp โ†’ Precipitation
.
7๏ธโƒฃ #COMMONIONEFFECT (NEET )
โœ”๏ธ Solubility decreases in presence of common ion
๐Ÿ“Œ Example:
AgCl solubility โ†“ in NaCl solution
๐Ÿ“Œ Reason: Equilibrium shifts backward


8๏ธโƒฃ #EFFECTOFPHONCOMMONION
โœ”๏ธ Solubility increases if no common ion present


9๏ธโƒฃ #SELECTIVEPRECIPITATION
โœ”๏ธ Salt with lower Ksp precipitates first
๐Ÿ“Œ Used in qualitative analysis


๐Ÿ”Ÿ #RELATIONBETWEENSOLUBILITYANDKsp
โœ”๏ธ Higher Ksp โ‰  higher solubility always
โœ”๏ธ Depends on stoichiometry of salt


1๏ธโƒฃ1๏ธโƒฃ #SOLUBILITYINPRESENCEOFCOMMONION
For AB in presence of Bโป concentration = C
Ksp = S ร— C
S = Ksp / C
๐Ÿ“Œ Used in buffer & salt solutions


1๏ธโƒฃ2๏ธโƒฃ #SOLUBILITYINPRESENCEOFPH
โœ”๏ธ For salts of weak acids โ†’ solubility increases in acidic medium
โœ”๏ธ For salts of weak bases โ†’ solubility increases in basic medium
๐Ÿ“Œ Example:
CaCOโ‚ƒ dissolves more in acidic solution


1๏ธโƒฃ3๏ธโƒฃ #TEMPERATUREEFFECT
โœ”๏ธ Ksp increases with temperature (usually)
โœ”๏ธ Endothermic dissolution favoured


1๏ธโƒฃ4๏ธโƒฃ #UNITOFKsp
โœ”๏ธ Depends on stoichiometry
โœ”๏ธ No fixed unit
๐Ÿ“Œ NEET note: Ksp has no unit


1๏ธโƒฃ5๏ธโƒฃ #COMPARISONOFKspVALUES
โœ”๏ธ Compare only salts with same formula type
โœ”๏ธ Otherwise comparison invalid


1๏ธโƒฃ6๏ธโƒฃ #PRECIPITATIONCONDITION
โœ”๏ธ Precipitation starts when IP just exceeds Ksp


1๏ธโƒฃ7๏ธโƒฃ #SOLUBILITYORDER
โœ”๏ธ Lower Ksp โ†’ lower solubility (for same type salts)


1๏ธโƒฃ8๏ธโƒฃ #NEETโš ๏ธTRAPS
โœ”๏ธ Ksp valid only for saturated solution
โœ”๏ธ Ksp โ‰  solubility
โœ”๏ธ Common ion reduces solubility
โœ”๏ธ Ksp independent of initial concentration
โœ”๏ธ Compare Ksp only at same temperature


1๏ธโƒฃ9๏ธโƒฃ #NUMERICALSHORTCUT
โœ”๏ธ If Ksp = 10โปยนโฐ for AB
S โ‰ˆ 10โปโต
โœ”๏ธ If Ksp = 4ร—10โปยนยฒ for ABโ‚‚
S โ‰ˆ 10โปโด


2๏ธโƒฃ0๏ธโƒฃ #ONELINEREVISION
โœ”๏ธ Ksp = ionic product at saturation
โœ”๏ธ Precipitation when IP > Ksp
โœ”๏ธ Common ion โ†“ solubility
โœ”๏ธ Same Ksp โ‰  same solubility
โค2๐Ÿ’ฏ2๐Ÿ˜Ž1