When NaOH is added to a buffer solution that contains 0.25 M HCN and 0.25 M...
When NaOH is added to a buffer solution that contains 0.25 M HCN and 0.25 M NaCN, which component reacts with the added hydroxide ion to maintain the pH of the solution? a) HCN - b) CN - c) Na + d) H2O e) OH -
Homework Answers
Solution:
A buffer solution is prepared from weak acid and its salt. Bufffer mixture always tends to resist the change in pH.
In a mixture of weak acid (HCN) and its salt (NaCN), when a strong base (NaOH) is added then HCN reacts with NaOH to produce H2O and NaCN (salt).
NaOH + HCN = H2O + NaCN
Therefore option is HCN.
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