# The pH of a fruit juice is 3.2. What is the hydrogen ion concentration of the juice?

Jul 18, 2017

$\left[{\text{H}}^{+}\right] = 6 \times {10}^{-} 4 M$

#### Explanation:

We're asked to find the $\left[{\text{H}}^{+}\right]$ of a solution, given its $\text{pH}$.

We can use the equation

$\left[\text{H"^+] = 10^(-"pH}\right)$

to find the hydrogen ion concentration.

We thus have

["H"^+] = 10^-3.2 = color(red)(6xx10^-4M

Since the $\text{pH}$ is rounded to one decimal place, the hydrogen ion concentration is rounded to one significant figure.