Question

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic. (a) When Marco is sick, he tests the pH of his saliva and finds that it is 6.1. What is the hydrogen ion concentration of his saliva

Answer 1

Answer: The hydrogen ion concentration of his saliva is $7.94\times 10^{-7}M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

To calculate the pH of the solution, we use the equation:

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

We are given:

pH of the saliva = 6.1

Putting values in above equation, we get:

$6.1=-\log[H^+]$

$[H^+]=10^{-6.1}=7.94\times 10^{-7}M$

Hence, the hydrogen ion concentration of his saliva is $7.94\times 10^{-7}M$