Question

Based on the definition of logarithms, what is the difference in hydrogen ion concentration between a substance with a pH of 2 and a substance with a pH of 3?

Answer 1

Answer: A substance with a pH of 2 has a 10 times higher concentration of H+ than a substance with a pH of 3.

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 and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

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

`pOH=-log{OH^-}`

`pH+pOH=14`

Given: pH=2

`2=-log[H^+]`

`[H^+]=10^(-2)M`

pH=3

`3=-log[H^+]`

`[H^+]=10^(-3)M`

A substance with a pH of 2 has a 10 times higher concentration of H+ than a substance with a pH of 3.

Answer 2

Based on the definition of logarithms, the difference in hydrogen ion concentration between a substance with a pH of 2 and a substance with a pH of 3:
A) A substance with a pH of 2 has a 10 times higher concentration of H+ than a substance with a pH of 3.

At pH= 2, [H+] = 0.01 M
At pH =3, [H+] = 0.001 M