at simplifying assumptions do we usually make in working problems involving the ionization of a polyprotic acids? Why are they usually valid? Under what conditions do they fail? Answer by selecting all ements. The approximations are usually valid because the first ionization constant for the polyprotic acid is usually much larger than the second ionization constant. The approximations are usually valid because the first ionization constant for the polyprotic acid is usually smaller than the second ionization constant. Nearly all of the H* comes from the second ionization. Nearly all of the H* comes from the first ionization. If the first two ionization constants are not very different, the approximations fail. If the first two ionization constants are not very different, the approximations are valid. The concentration of H* and the conjugate base of the polyprotic acid are approximately equal.

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 84AP
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Is it likely easier to remove the first proton or second proton from the acid? Would this make the first constant larger or smaller? What conditions must exist to be able to ignore the second ionization?
What simplifying assumptions do we usually make in working problems involving the ionization of a polyprotic acids? Why are they usually valid? Under what conditions do they fail? Answer by selecting all true
statements.
The approximations are usually valid because the first ionization constant for the polyprotic acid is usually much larger than the second ionization constant.
O The approximations are usually valid because the first ionization constant for the polyprotic acid is usually smaller than the second ionization constant.
Nearly all of the Ht comes from the second ionization.
Nearly all of the Ht comes from the first ionization.
O If the first two ionization constants are not very different, the approximations fail.
O If the first two ionization constants are not very different, the approximations are valid.
The concentration of H* and the conjugate base of the polyprotic acid are approximately equal.
O O O O O O
Transcribed Image Text:Is it likely easier to remove the first proton or second proton from the acid? Would this make the first constant larger or smaller? What conditions must exist to be able to ignore the second ionization? What simplifying assumptions do we usually make in working problems involving the ionization of a polyprotic acids? Why are they usually valid? Under what conditions do they fail? Answer by selecting all true statements. The approximations are usually valid because the first ionization constant for the polyprotic acid is usually much larger than the second ionization constant. O The approximations are usually valid because the first ionization constant for the polyprotic acid is usually smaller than the second ionization constant. Nearly all of the Ht comes from the second ionization. Nearly all of the Ht comes from the first ionization. O If the first two ionization constants are not very different, the approximations fail. O If the first two ionization constants are not very different, the approximations are valid. The concentration of H* and the conjugate base of the polyprotic acid are approximately equal. O O O O O O
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