Question

What is the concentration of hydronium ions in a solution with a ph = 3.9? 4.14 × 10-2 7.80 × 10-3 1.26 × 10-4 3.00 × 10-5?

Answer 1

The answer is C. 1.26 x 10^-4 I just took the test and got it correct

Answer 2

Answer: The concentration of hydronium ions in a solution is
`1.26* 10^(-4)`

Step-by-step explanation:

pH is defined negative logarithm of hydrogen or hydronium ion concentration present in a solution. It is basically defined as the power of hydrogen ions in a solution.

Mathematically,

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

We are given:

pH of the solution = 3.9

Putting values in above equation, we get:

`3.9=-\log[H^+]`

`[H^+]=antilog(-3.9)`

`[H^+]=1.26* 10^(-4)`

Hence, the concentration of hydronium ions in a solution is
`1.26* 10^(-4)`