Question

The hydronium ion concentration of a dilute solution of vinegar is 1.45 x 10^-5 M. What is the pH of this solution? a. 5.7b. -4.8c. 4.8 d. -5.7 e. 7.0

Answer 1

First, we have to remember that the pH is a scale that allows us to determine if a solution is acid or basic.

The equation for calculating the pH is:

`pH=\text{ -log \lparen\lbrack H}^+])\text{ }`

Being [H+], the concentration of hydronium ion.

Then, we have all the information to calculate the pH of the solution:

`pH=\text{ -log\lparen1.45*10}^(-5))=\text{ 4.839 }\approx\text{ 4.8}`

Then, the answer is that the vinegar solution's pH is equal to c. 4.8