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Write the balanced NET IONIC equation for the reaction that occurs when hydrobromic acid and sodium cyanide are combined. Use H3O instead of H . This reaction is classified as . A. Strong Acid Strong Base B. Weak Acid Strong Base C. Strong Acid Weak Base D. Weak Acid Weak Base The extent of this reaction is: . A. ... Below 50% B. ... 50% C. ... Above 50% D. ... 100%

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Answer:

A. Strong Acid Strong Base

D. ... 100%

Explanation:

The reaction of hydrobromic acid and sodium cyanide is a strong acid-strong base reaction. In solution, sodium cyanide functions as a strong base and reacts violently with strong acids. For strong acid- strong base reaction, the extent of reaction is usually 100%.

The molecular reaction equation is

NaCN(aq) + HBr(aq) ---------> NaBr(aq) + HCN(aq)

Ionically:

H3O+(aq) + CN- (aq) ----------> HCN(aq) +H2O (l)

HCN(aq) is a weak acid.

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