Question

When the [H+] in a solution is 1.7 × 10−9 M, what is the pOH ? 8.80 5.23 14 8.60

Answer 1

Answer:

pOH = 5.23

Explanation:

Given:

H+ concentration = 1.7*10⁻⁹ M

To determine:

pOH of the solution

Explanation:

pH and pOH measure the H+ and OH- ion concentrations respectively in a given solution and thereby reflect the degree of acidity and basicity of the solution.

pH and pOH are related as follows:

$pH + pOH = 14\\\\pH = -log[H+]\\\\For\ the\ given\ solution\\\\pH = -log(1.7*10^{-9}) = 8.77\\\\Therefore:\\\\pOH = 14.0 - pH = 14.0 -8.77 = 5.23$

Answer 2

PH = -log[H+]
pH = -log[1,7×10^-9]
pH = 8,77

pH + pOH = 14
pOH = 14 - 8,77
pOH = 5,23