The human population is increasing, so more food needs to be produced. Farmers use fertilisers to increase the yield of wheat. A farmer wants to find out the optimum concentration of fertiliser to use on his wheatplants.
He has a stock solution of concentrated fertiliser which is state das 100%. He dilutes the stock solution to make 5%, 10%, 15% and 20% solutions. He makes 100 cm3 of each solution.

(i)Describe how the farmer prepares 100 cm3 of the 20% solution?