Question

HELP!!!

Answer 1

Answer: 6.34

Explanation:

pH is the measure of acidity or alkalinity of a solution.

Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.Neutral substances have pH of 7.

First we have to calculate the pOH.

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

$pOH=-\log (2.20\times 10^{-8})$

$pOH=7.66$

Now we have to calculate the pH.

$pH+pOH=14\\\\pH=14-pOH\\\\pH=14-7.66=6.34$

Therefore the pH of the solution will be 6.34.

Answer 2

Answer;

pH = 6.34

Explanation;

pH is given as -log{H+]

But;

pH + pOH = 14

However;

pOH = -log [OH-]

[OH-] =  2.20 × 10−8 M

Thus;

pOH = -log (2.20 × 10−8 M)

        = 7.66

But;

pH = 14 - pOH

     = 14 - 7.66

     = 6.34