Question

A solution is prepared by dissolving 0.23 mol of hydrazoic acid and 0.27 mol of sodium azide in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the ________ present in the buffer solution. The Ka of hydrazoic acid is 1.9 ⋅ 10-5.

Answer 1

Answer:

The pH does not increase drastically because the NaOH reacts with the _HYDRAZOIC ACID__ present in the buffer solution.

Explanation:

NaOH reacts with the hydrazoic acid in the buffer

HN3 + OH? --> H2O + N3-

If you put acid in, it will react with N3-. Here is the equation below:

N3- + H+ --> HN3