Carbonic acid, H2CO3, is a weak diprotic acid. In a 0.1 M solution of the acid,...

Carbonic acid, H₂CO₃, is a weak diprotic acid. In a 0.1 M solution of the acid, which of the following species is present in the largest amount?

		H₂CO₃.
		H₃O⁺
		HCO₃

Solutions

Expert Solution

H₂CO₃, is a weak diprotic acid.

The dissociation of carbonic acid is ( by loosing one proton )

H₂CO₃ + H₂O HCO₃^- + H₃O⁺

This first dissociation occurs more fast.

The dissociation of HCO₃^- is

HCO₃^- + H₂O CO₃^2- + H₃O⁺

This second dissociation is done slowly.

Since the first dissociation of carbonic acid is more so the formed HCO₃^- is more.Since water place an important to occur dissociation the formed So the formed H₃O⁺ concentration will also more.

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We know that ?T _f = iK_f x m
Where

?T _f = depression in freezing point = ?

K _f = depression in freezing constant of water = 1.858

queen_honey_blossom answered 3 weeks ago

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Question

Carbonic acid, H2CO3, is a weak diprotic acid. In a 0.1 M solution of the acid,...

Solutions

Expert Solution

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