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Given the equation representing a reversible reaction:HCO3-(aq) + H2O(l) -> H2CO3(aq) + OH-(aq) W

June 2017 NY Regents Chemistry Exam

45 Given the equation representing a reversible reaction: HCO3-(aq) + H2O(l) -> H2CO3(aq) + OH-(aq)

Which formula represents the H+ acceptor in the forward reaction? (1) HCO3-(aq) (2) H2O(l)

(3) H2CO3(aq)

(4) OH-(aq)

Solution: Going from left to right, we can see that HCO3- becomes H2CO3 which means it accepted an H+ ion.

Answer: 1

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