Final answer:
The hydroxide ion concentration [OH-] for a solution with a pH of 9.29 is 1.94 x 10⁻⁵ M, calculated by finding the pOH and then using it to find [OH-].
Step-by-step explanation:
To calculate the hydroxide ion concentration, [OH-], for a solution with a pH of 9.29, we first need to find the concentration of hydronium ions [H₃O+] using the formula [H+] = 10-pH.
The pH and pOH of a solution are related by the equation pH + pOH = 14. Therefore, we can calculate pOH as 14 - pH. Once we have the pOH, we can find the [OH-] by using [OH-] = 10^-pOH.
Following these steps for a pH of 9.29:
[H+] = 10-9.29 = 5.13 x 10⁻¹⁰ M (concentration of hydronium ions)
pOH = 14 - 9.29 = 4.71
[OH-] = 10^-4.71
= 1.94 x 10⁻⁵ M