What is the pH of a solution prepared by diluting 75.00 mL of 0.10 M HCl with enough water to produce a total volume of 100.00 mL?
A)1.00
B)1.12
C)2.00
D)2.24

Question

Quizplus · Accepted Answer

The dilution formula is as follows: M1V1 = M2V2
where, 
M1 = initial molarity
V1 = initial volume
M2 = final molarity
V2 = final volume
Putting the values in the above formula,
0.10 M x 75.00 mL = M2 x 100.00 mL
M2 = 0.075 M
We know that HCl is a strong acid, which means it completely dissociates in water to form H+ and Cl- ions. Therefore, the concentration of H+ ions in the solution is 0.075 M.
pH = -log[H+]
pH = -log[0.075]
pH = 1.12
Therefore, the pH of the solution is 1.12, which is option B.

What Is the PH of a Solution Prepared by Diluting