Explanation
Given
volume of the solution = 250 mL
percentage of NaCl = 3.6%
Required: How to prepare the solution
Solution
% = amount of NaCl in g/250 mL
0.036 = amount of NaCl in g/250 mL
Amount of NaCl = 0.036 x 250 = 9 g
Step 1: Add 9 g of NaCl to 250 mL water
The percentage will be = (9/250)*100 = 3.6%
Answer
Add 9 g of NaCl to 250 mL of water
