Question

Of the following, which forms a neutral solution? Assume all acids and bases are combined in stoichiometrically equivalent amounts. Select the correct answer below: HCN(aq)+KOH(aq)⇌KCN(aq)+H2O(l) H2S(aq)+2LiOH(aq)⇌Li2S(aq)+2H2O(l) CH3CO2H(aq)+NaOH(aq)⇌NaCH3CO2(aq)+H2O(l) 2HNO3(aq)+Sr(OH)2(aq)⇌Sr(NO3)2(aq)+2H2O(l)

Answer 1

Solution :-

When weak acid is titrated with strong base then it forms slightly basic solution at the equivalence point.

When weak base is titrated with strong acid then it forms slightly acidic solution at the equivalence point.

When strong acid is titrated with strong base then it forms neutral solution at the equivalence point.

HCN(aq)+KOH(aq)⇌KCN(aq)+H2O(l)

In the above reaction weak acid is titrated with strong base therefore solution at the equivalence point will be basic.

H2S(aq)+2LiOH(aq)⇌Li2S(aq)+2H2O(l)

In the above reaction weak acid is titrated with strong base therefore solution at the equivalence point will be basic.

CH3CO2H(aq)+NaOH(aq)⇌NaCH3CO2(aq)+H2O(l)

In the above reaction weak acid is titrated with strong base therefore solution at the equivalence point will be basic.

2HNO3(aq)+Sr(OH)2(aq)⇌Sr(NO3)2(aq)+2H2O(l)

In the above reaction strong acid is titrated with strong base therefore solution at the equivalence point will be neutral.