Chapter 6.3, Problem 34E

To determine

To calculate: The pH value of baking soda and vinegar.

Answer to Problem 34E

The required pH value of baking soda is 8 and vinegar is 3.

Explanation of Solution

Given information:

Hydrogen ion concentration for the substance below:

Baking soda: $\left[{\text{H}}^{+}\right]={10}^{-8}\text{moles}\text{per}\text{liter}$ .

Vinegar: $\left[{\text{H}}^{+}\right]={10}^{-8}\text{moles}\text{per}\text{liter}$ .

Formula used:

pH value of a substance is: $\text{pH}=-\log \left[{\text{H}}^{+}\right]$ .

Here ${\text{H}}^{+}$ is the hydrogen concentration of the substance.

The given hydrogen ion concentration baking soda is ${10}^{-8}\text{moles}\text{per}\text{liter}$ .

Find the pH value.

  $\begin{array}{c}\text{pH}=-\log \left[{10}^{-8}\right]\\ =8\end{array}$

The given hydrogen ion concentration vinegar is ${10}^{-3}\text{moles}\text{per}\text{liter}$ .

Find the pH value.

  $\begin{array}{c}\text{pH}=-\log \left[{10}^{-3}\right]\\ =3\end{array}$

Hence, the required pH value of baking soda is 8 and for vinegar is 3.