Question

What is the pH of a 5.09 x 10-5 M solution of NaOH?

Answer 1

Answer: The pH of the solution is 9.71

Step-by-step explanation:

1 mole of NaOH produces 1 mole of sodium ions and 1 mole of hydroxide ions.

We are given:

pOH of the solution = 7.2

To calculate the pH of the solution, we need to determine pOH of the solution. To calculate pOh of the solution, we use the equation:

`pOH=-\log[OH^-]`

We are given:

`[OH^-]=5.09* 10^(-5)M`

Putting values in above equation, we get:

`pOH=-\log(5.09* 10^(-5))\\\\pOH=4.29`

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

`pH+pOH=14\\pH=14-4.29=9.71`

Hence, the pH of the solution is 9.71