Question

What is meant by concentration of a solution? How will you prepare a 10% solution of glucose in water?

Draw a neat and labelled diagram of the apparatus used to separate components of blue-black ink. Name the process and state the principle involved.

Identify the physical and chemical changes from the following:

Mixtures are constituted by more than one kind of pure form of matter. Sodium chloride is itself a pure substance matter. The solution is a homogenous mixture of two or more substances. Soda water is an example of mixture whereas sodium chloride is a compound.

Calculate the mass of sodium sulphate required to prepare its 20% (mass per cent) solution in 100g of water.