Question

Tomatoes are found to have a hydronium ion concentration of 5.9×10⁻⁵ M. What is the pH of these tomatoes?

Answer 1

According to the definition, pH (potential of hydrogen) is :

$pH = -log[H_3O^+]$ .

Therefore:

$pH = -log(5.9·10^{-5}) = 4.2$

Answer: the pH of these tomatoes is -log(5.9·10^-5) = 4.2