# Question #fe332

##### 1 Answer

Yes, your answer is correct.

#### Explanation:

As you know, a solution's pH is simply a measure of its concentration of *hydronium ions*, *hydrogen ions*,

More specifically, the pH of a solution is calculated by taking the **negative log base 10** of the concentration of hydrogen ions.

#color(blue)(|bar(ul(color(white)(a/a)"pH" = - log(["H"^(+)])color(white)(a/a)|)))#

This means that all you have to do to determine the pH of a solution of known concentration of hydrogen ions is to use that equation. In your case, you know that

#["H"^(+)] = "0.020 M"#

The pH of the solution will thus be

#"pH" = - log(0.020) = 1.699 ~~ color(green)(|bar(ul(color(white)(a/a)1.70color(white)(a/a)|)))#

Therefore, your answer is correct.