Carbonic acid is a weak diprotic acid whose dissociationreactions are:

H2CO3 (aq) + H2O (l) --> (forward/reverse arrow) H3O+ (aq) +HCO3- (aq) Ka1= 4.3 x 10^-7

HCO3^- (aq) + H2O (l) --> (forward/reverse arrow) H3O+ (aq) +CO3^2- (aq) Ka2= 4.8 x 10^-11

a. What is the equilibrium pH of a carbonic acid solution, whoseoriginal concentration is 0.034 M?

b. What are the concentrations of the other two species?

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Bunny GreenfelderLv2

30 Jun 2019

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