Question

a. Calculate the pH of a solution that has [H3O+]= 4.3 x 10-5 M. b. Is the solution acidic or basic? How do you know?

Answer 1

*
`pH=4.37`

* The solution is acidic since the pH is below 7.

Step-by-step explanation:

Hello,

In this case, we can mathematically define the pH by:

`pH=-log([H_3O^+])`

Thus, for the given hydronium concentration we simply compute the pH:

`pH=-log(4.3x10^(-5))=4.37`

Thereby, we conclude the solution is acidic due to the fact that the pH is below 7 which is the neutral point and above it the solutions are basic.

Regards.