Question

When the pH of a solution is 2, the concentration of hydronium ions is10-2 M = 0.01 M. Is it acidic or basic?

Answer 1

Explanations:

The formula for calculating the pH of the solution is given as:

`pH=-log[H_3O^+]`

Given that the pH is 2, then;

`\begin{gathered} 2=-log[H_3O^+] \\ log[H_3O^+]=-2 \\ [H_3O^+]=10^(-2) \\ [H_3O^+]=0.01M \end{gathered}`

Hence the concentration of the hydronium ion is 0.01M

Since the pH of the solution is less than 7, hence the solution is acidic