Which one of these equations represents the reaction of a weak acid with a strong base? a. h + (aq) + oh– (aq) → h2o(aq) b. h + (aq) + ch3nh2(aq) → ch3nh3 + (aq) c. oh– (aq) + hcn(aq) → h2o(aq) + cn– (aq) d. hcn(aq) + ch3nh2(aq) → ch3nh3 + (aq) + cn– (aq)?

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c. OH– (aq) + HCNaq) → H2O(aq) + CN– (aq)

Explanation:-

A strong base is one which is fully dissociated in aqueous solution. So if we are looking for a strong base we should be looking for OH- (aq).

Similarly a strong acid is one which is fully dissociated in aqueous solution. So if we are looking for a strong acid we should be looking for H+ (aq).

The questions is asking for a weak acid and a strong base. So our answer should have a OH- but not a H+ on the left side of the correct answer.

So our only possible answer is option C.

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