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Answered

You want to make 100 mL of a .1 M sodium chloride solution. You have a 1 M stock sodium chloride solution on hand already that you need to mix with water to obtain this .1 M solution.
A) How many mL of stock solution do you need?
B) how many mL of water do you need?

Answer :

Ihlestergo

Answer: 10 mL of stock solution and 90 mL water

Explanation: 1M NaCl = 1mol/L

to make 0.1M solution needs 0.1mol/L

= 0.01mol per 100mL

0.01 mol is in 10 mL of 1M solution

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