Question

The pH of lemon juice is approximately 2.40. At this pH, the hydronium ion concentration is closest to which concentration?

A: 2.5 x 10 ^-12 M
B: 4.0 x 10^-3 M
C: 0.38 M
D: 5.6 x 10^-4 M

Answer 1

The hydronium ion concentration in lemon juice, with a pH of 2.40, is approximately 100 times greater than that in tomato juice with a pH of 4.0.

Step-by-step explanation:

The pH of a solution is a measure of its acidity or alkalinity. It is a logarithmic scale that represents the concentration of hydronium ions in the solution. The lower the pH value, the higher the concentration of hydronium ions.

In this case, the pH of lemon juice is approximately 2.40. Since the pH scale is logarithmic, an increase of one unit represents a tenfold increase in hydronium ion concentration. Therefore, the difference in hydronium ion concentration between lemon juice and tomato juice, which has a pH of 4.0, is approximately 100 times.

This means that the hydronium ion concentration in lemon juice is 100 times greater than that in tomato juice.