Question

Determine the number of grams of NaCl necessary to make up 100 mL of a 0.10 M solution.


0.017 g
0.58 g
1.7 g
58 g

Answer 1

100 ml 0.10 M solution has 0.10*0.1 = 0.01 moles of NaCl.
0.01 moles of NaCl is required to make the solution.
So the weight of NaCl required(no. of moles * molar mass) is 0.01*58 = 0.58 grams.
Option b) 0.58 grams.