Question

QUESTION 29 The PH of a solution whose Hydroxide ion concentration is 0.45M is:

A. 0.071
B. 0.347
C. 13.65
D. 12.48
E. 12.7
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Answer 1

C. 13.65.

Step-by-step explanation:

With the given hydroxide ion concentration [OH⁻] we can calculate the pOH of the solution, using the following formula:

• pOH = -log[OH⁻]

• pOH = 0.35

Then, with the pOH we can proceed to calculate the pH of the solution, with the formula:

• pH + pOH = 14

• pH = 14 - pOH

• pH = 13.65

The correct answer is option C. 13.65.