Mole Concept, Empirical Formula & Molecular Formula

Description

The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.

When dealing with particles at an atomic (or molecular) level, even one gram of a pure element is known to contain a huge number of atoms. This is where the mole concept is widely used. It primarily focuses on the unit known as a ‘mole’, which is a count of a very large number of particles.

In short, mole is the chemical quantity unit. This connects the atom with the macroscopic quantities of material with which we work in the laboratory. It allows the chemist to weigh quantities of two substances, say iron and sulphur, in order to obtain equal numbers of iron and sulphur atoms.

Coming to the course, this is designed for beginners. With the details of atomic mass, relative atomic mass, molecular mass, relative molecular mass  we introduce "Mole concept". Application of mole concept to chemical reactions, in finding out the empirical and molecular formula is also discussed.

To enable the students to have clarity about the concepts, numerical problems are also added wherever required.

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