Describe how are you going to prepare 150 grams of 5% solution NaCl by weight.

Question

Please state step by step calculations

Answer 1

5% by weight means 5 grams of NaCl in 100 g of solution

Since we want 150 g of solution, we find the mass of NaCl as follows:

150 g solution x 5 g NaCl / 100 g solution = 7.5 g NaCl needed

Procedure

Weigh out 7.5 g of NaCl and add water until the final weight is 150 g