Question

An aqueous solution athas aconcentration of. Calculate theconcentration. Be sure your answer has 1 significant digits.

Answer 1

The question is incomplete, here is the complete question.

An aqueous solution at 25°C has a
`OH^-` concentration of
`1.9* 10^(-8)M` . Calculate the
`H_3O^+` concentration. Be sure your answer has the correct number of significant digits.

Answer: The hydronium ion concentration of the solution is
`5.25* 10^(-7)`

Step-by-step explanation:

To calculate pOH of the solution, we use the equation:

`pOH=-\log[OH^-]`

We are given:

`[OH^-]=1.9* 10^(-8)M`

Putting values in above equation, we get:

`pOH=-\log(1.9* 10^(-8))`

`pOH=7.72`

To calculate the hydronium ion concentration, we first calculate pH of the solution, which is:

pH + pOH = 14

pH + 7.72 = 14

pH = 14 - 7.72 = 6.28

To calculate the hydronium ion concentration of the solution, we use the equation:

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

We are given:

pH = 6.28

Putting values in above equation, we get:

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

`[H_3O^+]=5.25* 10^(-7)`

Hence, the hydronium ion concentration of the solution is
`5.25* 10^(-7)`