ππThe difference between pH and pOH lies in what they measure in a solution:
β’ pH: Measures the concentration of hydrogen ions (HβΊ) in a solution. A lower pH indicates a higher concentration of HβΊ ions, meaning the solution is more acidic.
β’ pOH: Measures the concentration of hydroxide ions (OHβ») in a solution. A lower pOH indicates a higher concentration of OHβ» ions, meaning the solution is more basic (alkaline).
The Relationship:
pH and pOH are related through the ion product constant of water (Kw):
Kw = [HβΊ][OHβ»] β 1.0 x 10β»ΒΉβ΄ at 25Β°C
Taking the negative logarithm (base 10) of both sides of this equation gives:
14 = pH + pOH
This means that at 25Β°C, the sum of pH and pOH always equals 14. Therefore, if you know the pH, you can easily calculate the pOH, and vice versa.
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β’ pH: Measures the concentration of hydrogen ions (HβΊ) in a solution. A lower pH indicates a higher concentration of HβΊ ions, meaning the solution is more acidic.
β’ pOH: Measures the concentration of hydroxide ions (OHβ») in a solution. A lower pOH indicates a higher concentration of OHβ» ions, meaning the solution is more basic (alkaline).
The Relationship:
pH and pOH are related through the ion product constant of water (Kw):
Kw = [HβΊ][OHβ»] β 1.0 x 10β»ΒΉβ΄ at 25Β°C
Taking the negative logarithm (base 10) of both sides of this equation gives:
14 = pH + pOH
This means that at 25Β°C, the sum of pH and pOH always equals 14. Therefore, if you know the pH, you can easily calculate the pOH, and vice versa.
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UNIT -5 (Metals and Non Metals).pdf
4.3 MB
This is Chem supplementary note for Grade 10th students
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A car travels 100 km in 2 hours. What is its average speed?
a) 200 km/h
b) 50 km/h
c) 25 km/h
d) 100 km/h
a) 200 km/h
b) 50 km/h
c) 25 km/h
d) 100 km/h
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If an object has a constant acceleration, its velocity:
a) Is also constant.
b) Changes at a constant rate.
c) Changes at an increasing rate.
d) Is zero.
a) Is also constant.
b) Changes at a constant rate.
c) Changes at an increasing rate.
d) Is zero.
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βοΈαα αα
βοΈ Video Quiz
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What does the slope of a distance-time graph represent?
a) Acceleration
b) Velocity
c) Displacement
d) Time
a) Acceleration
b) Velocity
c) Displacement
d) Time
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An object is at rest if its:
a) Acceleration is zero.
b) Velocity is changing.
c) Velocity is zero.
d) Displacement is zero
a) Acceleration is zero.
b) Velocity is changing.
c) Velocity is zero.
d) Displacement is zero
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At the highest point of its trajectory, a projectile has:
a) Zero velocity b) Zero horizontal velocity c) Zero vertical velocity d) Zero acceleration
a) Zero velocity b) Zero horizontal velocity c) Zero vertical velocity d) Zero acceleration
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1. Which of the following is the large taxonomic rank?
a) Species
b) Genus
c) Kingdom
d) Family
a) Species
b) Genus
c) Kingdom
d) Family
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