The hydroxide ion concentraion in a solution with a pH of 3.5

1 answer

To find the hydroxide ion concentration in a solution with a pH of 3.5, we can use the formula:

pOH = 14 - pH

Since pOH and hydroxide ion concentration are related through the formula:

pOH = -log[OH-]

We can rearrange the formula to solve for [OH-]:

[OH-] = 10^(-pOH)

Substituting the value of pOH calculated using the pH given:

pOH = 14 - 3.5
pOH = 10.5

[OH-] = 10^(-10.5)

Calculating:

[OH-] = 3.16 x 10^(-11) M

Therefore, the hydroxide ion concentration in a solution with a pH of 3.5 is 3.16 x 10^(-11) M.