Which one of the following polyprotic acids is the weakest
Which one of the following polyprotic acids is the weakest acid in terms of its first acid-ionization equilibrium constant?
A) ascorbic acid (K1=6.8 x 10-5)
B) H2C2O4 (K1=5.6 x 10-2)
C) H2S (K1= 9.5 x 10-8)
D) H2CO3 (K1= 4.7 x10-7)
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