Question

What is the concentration of H^ + at apH = 2 ? Mol / L What is the concentration of H^ + ions at apH = 6 ? Mol/L How many more H^ + ions are there in a solution at a pH = 2 than in a solution at a pH = 6?

Answer 1

The concentration of hydrogen ion at pH is equal to 2 :
`= [H^+]=0.01 mol/L`

The concentration of hydrogen ion at pH is equal to 6 :
`[H^+]'=0.000001 mol/L`

There are 0.009999 more moles of
`H^+` ions in a solution at a pH = 2 than in a solution at a pH = 6.

Step-by-step explanation:

The pH of the solution is the negative logarithm of hydrogen ion concentration in an aqueous solution.

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

The hydrogen ion concentration at pH is equal to 2 = [H^+]

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

`[H^+]=10^(-2)M= 0.01 M=0.01 mol/L`

The hydrogen ion concentration at pH is equal to 6 = [H^+]

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

`[H^+]=10^(-6)M= 0.000001 M= 0.000001 mol/L`

Concentration of hydrogen ion at pH is equal to 2 =
`[H^+]=0.01 mol/L`

Concentration of hydrogen ion at pH is equal to 6 =
`[H^+]'=0.000001 mol/L`

The difference between hydrogen ion concentration at pH 2 and pH 6 :

`= [H^+]-[H^+]' = 0.01 mol/L- 0.000001 mol/L = 0.009999 mol/L`

Moles of hydrogen ion in 0.009999 mol/L solution :

`=0.009999 mol/L* 1 L=0.009999 mol`

There are 0.009999 more moles of
`H^+` ions in a solution at a pH = 2 than in a solution at a pH = 6.