This video very well explains what is molecular formula and empirical formula. The difference between the molecular and empirical formula. also explains how to calculate percentage by mass in a compound.

This video explains how to calculate the reacting masses and moles from an equation of a given reaction with solved examples

video explains what is molar gas volume with the help of experimental method and discusses the related solved examples.

This video explains with solved examples, what is limiting reagent.

This video explains the concept of percentage yield and percentage product with solved examples. also explains a short cut method of calculating limiting reagent.

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This video explains the basics of what is concentration, what is the difference between dilute and concentrated solution. With the help of formula some solved examples are also discussed.

This video explains what is titration and describes the tips to calculate concentration of a solution. It also has solved examples to calculate concentration of a solution with the help of titration with solution of known concentration.

Animated explanation of states of matter and particle/kinetic theory is quite useful to understand the basics of matter

Animated explanation of changing of states in terms of particle theory is shown in the video. This video is not only helpful at initial IGCSE/GCSE chemistry but equally helpful at checkpoint science also.

In this video topical questions of ionic bond is discussed and explained in detail. the PDF of these questions is given here. It can be used for IGCSE /GCSE and A level chemistry.
https://drive.google.com/file/d/14xmNnp2ZkPrVbEZlorMeAK7tYUntDjXw/view?usp=sharing

The topical questions of covalent bonding is discussed and explained in detail. In accordance with the IGCSE and GCSE board paper the questions are discussed. The link for the PDF of the same worksheet is given here :
https://drive.google.com/file/d/1sZg…