A solution is prepared by dissolving 111.9 g HCl(g) in enough water to make 160.0 L of solution. The pH of this solution is
A) 1.72
B) 12.28
C) 0.155
D) 3.07
E) none of these

Question

Quizplus · Accepted Answer

The molarity of the solution is calculated by dividing the moles of HCl by the volume of the solution in liters. The moles of HCl are found by dividing the mass (111.9 g) by the molar mass (36.46 g/mol), resulting in approximately 3.07 moles. Dividing by 160.0 L gives a molarity of about 0.0192 M. The pH is the negative logarithm of the hydrogen ion concentration, so pH = -log(0.0192) ≈ 1.72.

A Solution Is Prepared by Dissolving 111