Question

A solution of HCl has a concentration of 1.20 x 10-2 M. What is the pH of this solution?

pH = 1.20

pH = 11.2

pH = 1.92

pH = 2.33

Answer 1

-log (1.2x10^-2) = 1.92 so C

Answer 2

Answer: The pH of the solution is 1.92

Step-by-step explanation:

To calculate the pH of the solution, we use the equation:

`pH=-\log[H^+]`

We are given:

Hydrochloric acid is a monoprotic acid and it dissociates 1 mole of hydrogen ions. So, the concentration of hydrogen ions is
`1.20* 10^(-2)M`

`[H^+]=1.20* 10^(-2)M`

Putting values in above equation, we get:

`pH=-\log(1.20* 10^(-2))\\\\pH=1.92`

Hence, the pH of the solution is 1.92