Question

How many grams of NaCl are required to prepare 100 mL of a solution of 1 M NaCl?

Answer 1

5.85 g of NaCl is required to prepare a 100 ml, 1M solution of NaCl.

Explanation:

1. 1 litre, 1M solution of NaCl requires 58.5g of NaCl.

2. Thus we can find out the amount of NaCl required for 100 ml using the given formula.

3. Given:

W1 = 58.5 g, V1 = 1000 ml

W2 = Unkown, V2 = 100ml

4. Formula : W1/V1 = W2/V2

5. Calculation : W2 = ( W1 x V2) / V1

                               = ( 58.5 x 100) /1000

                              =  5.85g

Answer 2

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