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Question

Which of the following is/are true concerning multiprotic acids where Ka1>> Ka2?
1) In a solution made from H3A, the equilibrium concentration of H3O+and H2A-can be accurately determined from the first ionization without accounting for the remaining ionizations.
2) In a solution made from H2A, the equilibrium concentration of the fully deprotonated form of the acid (A2-) is approximately equal to Ka1.
3) In general the second ionization constant of a triprotic acid is nearly equal to the third ionization constant and both are much smaller than the first ionization constant.
A) 1 only
B) 2 only
C) 3 only
D) 1 and 3
E) 1, 2, and 3

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