Question

Solution F has a pH of 11, and Solution G has a pH of 13.

How does the concentration of hydroxide ions in Solution F differ from Solution G?


Solution G has three times as many hydroxide ions as Solution F.

Solution G has 100 times more hydroxide ions than Solution F.

Solution F has 100 times more hydroxide ions than Solution G.

Solution F has three times as many hydroxide ions as Solution G.

Answer 1

Solution G has 100 times more hydroxide ions than Solution F.

Step-by-step explanation:

∵ pH + pOH = 14.

∴ pOH = 14 - pH.

• For solution F:

pOH = 14 - pH = 14 - 11 = 3.

∵ pOH = -log[OH⁻] = 3.

∴ [OH⁻] = 0.001 M.

• For solution G:

pOH = 14 - pH = 14 - 13 = 1.

∵ pOH = -log[OH⁻] = 1.

∴ [OH⁻] = 0.1 M.

∴ [OH⁻] of solution G / [OH⁻] of solution F = (0.1)/(0.001) = 100.

So, Solution G has 100 times more hydroxide ions than Solution F.