How much more [H+] does lemon juice (pH 2) have compared with pure water (pH 7)? Remember that each pH unit represents a 10 fold

Question

2 months ago

14

change in the [H+].

1 answer:

Tresset [2.2K] · Answer 1 · 2026-03-17T23:09:13+03:00

Answer:

$10^5 \\or\\100,000$

Explanation:

The pH formula is given by

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

It's also stated that each pH unit indicates a tenfold change in hydrogen ion concentration.

For lemon juice with a pH of 2, the hydrogen ion concentration is

$10^-2\\= \frac{1}{100}$

While for pure water, which has a pH of $7$ , the concentration is

$10^ -7\\= \frac{1}{10000000}$

Thus, the concentration of H+ ions in lemon juice is $10^5$ times greater than in pure water.