Question

The $pH$ of ${10}^{-7}MNaOH$ is:

• A. $7.01$
• B. between $7$ and $8$
• C. between $8$ and $9$
• D. greater than $10$

Answer 1

Answer: (A)

$7.01$

The concentration of ${\left[OH\right]}^{-}$ ion in the NaOH ${10}^{-7}$

The formula is used as

$P^{OH}=-log{\left[OH\right]}^{-}$

$P^{OH}=-(-7)=7$

$P^H=14-7=7$