Question

An aqueous solution at 25°c has a poh of 7.87 . calculate the ph. be sure your answer has the correct number of significant digits.

Answer 1

Answer is: an aqueous solution at 25°C has a pH of 6,13.
pOH(solution) = 7,87
pH + pOH = 14.
pOH(solution) = 14 - 7,87
pOH(solution) = 6,13.
pH is the negative of the logarithm of the H3O⁺ ion concentration.
pOH is the negative of the logarithm of the OH⁻ ion concentration.

Answer 2

Answer:

pH = 6.13 (3 significant figures)

Explanation:

Given:

pOH of the solution = 7.87

To determine:

pH of the solution

Explanation:

pH is a parameter which reflects the H+ ion concentration (acidity) of a given solution where pOH is indicative of the OH- ion (basicity) concentration. The two are related as follows:

$pH + pOH = 14.0\\\\Therefore, pH = 14.0-pOH$

For the given solution:

$pH = 14.0 - 7.87 = 6.13$