Question

In chemistry, the pH of a solution is a measure of the acidity or alkalinity of a solution. Water has a pH of 7 and, in general, acids have a pH less than 7 and alkaline

solutions have a pH greater than 7. Find the pH of a solution with a hydronium ion concentration of 8.3 x 10-6 moles/liter. Round your answer to two decimal places,
if necessary

Answer 1

`pH = 5.08`

Explanation:

The pH of a solution can be calculated from its hydronium concentration using the equation below:

`pH = -\log [H_3O^+]`

where
`[H_3O^+]` is the hydronium ion concentration in mol/liter unit. This notation is the same as the more familiar symbol
`[H^+]` for hydrogen ion concentration. Since the hydronium ion concentration is
`8.3×10^(-6)\:\text{mol/L},` the pH value of the solution is

`pH = -\log (8.3×10^(-6)) = -(5.08) = 5.08`

This means that the solution is acidic since its pH value is below 7.