Question

Ka1, Ka2 and Ka3 are the respective ionization constants for the following reactions (a),(b), and (c).
(a) H2C2O4⇌H++HC2O4−
(b) HC2O4−⇌H++HC2O42−
(c) H2C2O4⇌2H++C2O42−
The relationship between Ka1,Ka2 and Ka3 is given as

• A. Ka3=Ka1+Ka2
• B. Ka3=Ka1−Ka2
• C. Ka3=$\frac{Ka_1}{Ka_2}$
• D. Ka3=Ka1×Ka2

Answer 1

Answer: (D)

Ka3=Ka1×Ka2

Answer 2

H2C2O4⇌H++HC2O4− Ka1
H2C2O4−⇌H++C242− Ka2
H2C2O4⇌2H++C2O42− Ka2