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Solving for pH, pOH and [H+]

Hi, I need some assistance with the following questions:

1. Processed cheese must be at a pH of 5.5 to 5.9 to prevent the growth of unwanted microorganisms. The quality control supervisor receives a report that a sample has a [OH-] of 1.2x10^-8. Find pH, pOH, [H+] of this sample.

2. How many grams of potassium hydroxide, KOH, would be necessary to prepare 175 mL of a solution that is 0.45M in KOH? What is the pH of this solution?

Solution Preview

a) pOH = -Log[OH-] = -Log(1.2x10^-8 = 7.92

pH + pOH = 14
pH = 14-pOH = 14-7.92 = 6.08

pH = ...

Solution Summary

This solution is comprised of a completed response which works through all of the steps required for both of these calculation based chemistry problems. All of the necessary equations and variables are provided.