Question

you are given three solutions A,B and C with pH values 2,10 and 13 .write which solution has more hydrogen ion concentration. state the nature of each

Answer 1

A is acid ,B is base and C is also base . A is more hydrogen ion concentration

Answer 2

Answer: The highest concentration of hydrogen ions is in solution A with pH = 2. Solution A is an acid, solution B and C are bases.

Explanation:

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

pH is calculated by taking negative logarithm of hydrogen ion concentration. Acids have pH ranging from 1 to 6.9, neutral solutions have pH of 7 and bases have pH raging from 7.1 to 14.

$pH=-\log [H^+]$

$pH=log\frac {1}{H^+}$

Thus as pH and $H^+$ are inversely related, a solution having lower pH will have more amount of $H^+$ concentration and vice versa.

1. Given: pH=2, acid

$2=-\log [H^+]$

$[H^+]=10^{-2}M$

2. Given: pH=10 , base

$10=-\log [H^+]$

$[H^+]=10^{-10}M$

3. Given: pH=13 , base

$13=-\log [H^+]$

$[H^+]=10^{-13}M$