A solution is prepared by mixing 15.0 mL of 0.100 M HCl and 5.00 mL of 0.200 M NaCl. What is the molarity of chloride ion in this solution?
A)0.175
B)8.00
C)1.25
D)0.0250
E)0.125

Question

Quizplus · Accepted Answer

The total volume of the solution is 20.0 mL. The moles of Cl- from HCl is 0.0015 mol and from NaCl is 0.0010 mol. The total moles of Cl- is 0.0025 mol. Molarity = moles/volume (L) = 0.0025 mol / 0.020 L = 0.125 M.

A Solution Is Prepared by Mixing 15