Question

A chemist is using a solution of HNO3 that has a pH of 3. 75. What is [H ] for the solution? Round to the nearest hundredth. × 10n M n =.

Answer 1

The estimation of the acidic and the basic character of a solution is called and defined by the pH. The $\rm [H^{+}]$ concentration of the solution will be $\rm 1.77\times 10^{-4}.$

What is the pH?

pH is a measurement of the free hydrogen and hydroxyl ions in the solution of the substance.

It can be calculated as:

$\rm pH = - \rm log[H^{+}]$

Given,

pH = 3.75

Substituting values in the equation:

$\begin{aligned}\rm 3.75 &= -\rm log[H^{+}]\\\\\rm [H^{+}] &= 10^{-3.75}\\\\&= 1.7782 \times 10^{-4}\end{aligned}$

Therefore,  $\rm 1.77\times 10^{-4}$ is the concentration of the hydrogen ions.

Learn more about pH here:

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