Question

Find the concentration of H* ions at a pH = 11 and

pH = 6. Then divide the concentration of H* ions at a
pH = 11 by the of H* ions at a pH = 6. Record your
answer in Table C.
What is the concentration of H* ions at a pH = 11?
I
mol/L
What is the concentration of H* ions at a pH = 6?
mol/L
How many fewer H* ions are there in a solution at a
pH = 11 than in a solution at a pH=6?

Answer 1

The concentration of H+ ions can be calculated using the formula:

[H+] = 10^(-pH)

pH = 11:
[H+] = 10^(-11)
[H+] = 0.0000000001 mol/L
pH = 6:
[H+] = 10^(-6)
[H+] = 0.000001 mol/L
To find the difference in the concentration of H+ ions between pH 11 and pH 6:

Concentration at pH 11 - Concentration at pH 6
= 0.0000000001 mol/L - 0.000001 mol/L
= -0.0000000099 mol/L

Therefore, there are 0.0000000099 mol/L fewer H+ ions in a solution at pH 11 compared to a solution at pH 6.

(9.99^-7 Mol/L )