Question

What is the ph of a solution with a hydroxyl ion [oh−] concentration of 10-12 m?

Answer 1

We can calculate for the pH using the formula:

pH = 14 – pOH

 

Where pOH is:

pOH = - log [OH]

pOH = - log (10^-12) = 12

 

So pH is therefore:

pH = 14-12 = 2

 

Answer:

pH = 2

Answer 2

The pH of the solution is  2.

What is pH?

• pH stands for potential hydrogen. It tells about the acidity and basicity of any solution.

By the formula:

The sum of pH and pOH is always 14

pH = 14 - pOH

Where pOH is  $-log^[^O^H^]$

pOH = $- log^ (^1^0^-^1^2^) = 12$

Then, 14 -  12 = 2

Hence, the pH of the solution is 2.

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