 We can use the initial pH of a weak acid or a weak base to determine the Ka for the weak acid or the Kb for the weak base. We have a 0.1 molar solution of acetic acid. We're going to use our pH probe to read the pH. We'll use our pH probe to measure the pH of a 0.1 molar solution of ammonia. Use the pH of the acetic acid solution and the pH of the ammonia solution to calculate the Ka for acetic acid and the Kb for ammonia. In your data table, you will have some additional pHs for some other weak acids and weak bases. Complete the calculations for them as well.