Q.10.65 - An Introduction to General, Organic, and Biological Chemistry

Question

In Larry's esophagal pH test, a pH value of 3.60 was recorded in the esophagus. What is the $\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$ in his esophagus?

Step-by-Step Solution

Answer

The $\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$ in his esophagus is $2.5\times {10}^{-4}M$

Step 1 : Given information

pH or "potential of hydrogen" is a scale used to specify the acidity or basicity of a watery solution. Acidic solutions are estimated to have lower pH values than basic or alkaline solutions.

Step 2: Explanation

Given,

pH in the stomach is $3.6$

Using,

$pH=-{\log }_{10}\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$

$\Rightarrow \left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]={10}^{-pH}$

$$\begin{gathered} =\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]={10}^{-3.60} \\ =\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]=2.5\times {10}^{-4}M \end{gathered}$$