1. you are asked to make 200 mls of a 20mm working (diluted) solution of nacl using a 2m stock solution. record the volume of 2m stock solution and the volume of water you would use the make the working (diluted) solution.

The volume of 2M stock solution added = 2 mL

The volume of water = 198 mL

Explanation:

Considering

Given  that:

So,  

The volume of 2M stock solution added = 2 mL

The volume of water = 200 - 2 mL = 198 mL

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