Question

if the ph of a solution is 2 then ph of concentration of OH- ions in the solution is

Answer 1

Answer:

very dilute

Explanation:

The OH-ions are concentrated in basic solutions

and diluted with increase of acidity of solution

Answer 2

Given: pH of solution is 2.

To find: concentration of $OH^{-}$ in it.

Step-by-step method:

Step 1 of 2

The pH of a solution is calculated by using the formula:

$pH=-log[H^{+} ]$

And $pH+pOH=14$.

Therefore,

$pOH=14-pH\\pOH=14-2\\pOH=12$

Step 2 of 2

$pOH=-log[OH^{-} ]$

Substituting pOH we will get the concentration of $OH^{-}$ .

$12=-log[OH^{-} ]\\-12=log[OH^{-} ]\\antilog(-12)=[OH^{-} ]\\OH^{-} =10^{-12}$

The concentration of hydroxide ion is very less. That is $10^{-12}$.