How to make 5% solution of copper sulphate and sodium carbonate ?

A 5% solution of copper sulphate means that 5g of copper sulphate is dissolved in 95g of solvent, thereby making the total mass of the solution 100g. That is, 5g of copper sulphate is present per 100g of the solution. Hence, a 5% solution of copper sulphate can be prepared by dissolving 5g of the compound in 95g of solvent (say water). 

Similarly, we can prepare a 5% solution of sodium carbonate.