Question

When the pH of a solution is 12.83, what is [H+]

Answer 1

Answer:

There are 1.479×10−13 concentration of hydrogen ions molL.

Explanation:

Because pH is a logarthmic scale, we can use the formula: [H+]=10-pH. Where...
=> [H+] is the concentration of hydrogen ions in the solution.
=> pH is the pH of the solution. 
=> Where 10 is the base of the power - it's a logarithm formula.

We can now just sub in the values and solve for [H+].

[H+]=10-pH=10−(12.83)=1.479108388×10−13

We can round (if required) to 1.479×10−13.

Thus, there are 1.479×10−13 concentration of hydrogen ions molL.

Hope this helps :)

Answer 2

Answer: 1.5 × 10–13M