Question

what is the hydronium ion concentration of a solution with a poh of 6.90? 6.29 × 10−7 m 6.53 × 10−7 m 7.18 × 10−8 m 7.94 × 10−8 m

Answer 1

The hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.

Option D) is the correct answer.

What is pH of solution?

The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration  [H+] of the given solution.

From the formular;

pH = -log[ H⁺ ]

pH + pOH = 14

Given that;

• pOH =  6.90

• Hydronium ion concentration OH⁻ = ?

First we find the pH

pH + pOH = 14

pH + 6.90 = 14

pH = 14 - 6.90

pH = 7.1

Now, from the above expression;

pH = -log[ H⁺ ]

Hence;

[ H⁺] = 10^(-pH)

[ H⁺] = 10^(-7.1)

[ H⁺] = 7.94 × 10⁻⁸M

Therefore, the hydronium ion concentration of the solution with given value of pOH is 7.94 × 10⁻⁸M.

Option D) is the correct answer.

Learn more about pH & pOH here: brainly.com/question/17144456

#SPJ1