If pH = -log [H+], and the pH of lemon juice is 2.2, what is the concentration of hydrogen ions [H+] in gram atoms per liter? Round to the nearest ten thousandths.

Question

asked Oct 16, 2023 69.3k views

1 Answer

Karl Doenitz · Answer 1 · 2023-10-23T04:09:11+0000

The pH is calculated using the formula:

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

The question gives the pH of lemon juice to be 2.2.

Hence, the formula is written to be:

$2.2=-\log[H^+]$

Multiply both sides by -1:

$\log[H^+]=-2.2$

Since the log is in base 10, we have:

$\log_(10)[H^+]=-2.2$

Apply the law of log