An aqueous 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
Of hydrazoic acid is 1.9 × 10^-5.

Question

An aqueous 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

Of hydrazoic acid is 1.9 × 10^-5.

Quizplus · Accepted Answer

The addition of NaOH to the buffer solution causes the pH to increase slightly, indicating that the solution was initially acidic. The buffer solution contains hydrazoic acid and sodium azide, which are a weak acid and its conjugate base, respectively. The pH of the buffer solution is maintained due to the presence of the weak acid and its conjugate base, which react with any added acid or base to prevent significant changes in pH. NaOH is a strong base and will react with the weak acid present in the buffer solution. Therefore, the correct answer is D, hydrazoic acid.

An Aqueous Solution Is Prepared by Dissolving 0