Polyprotic Acid Calculations
Chapter 17-14
	University of Arkansas at Little Rock Dr. Robert Belford and Caasey Hawkins

Consider 0.50M of H₂SeO₃ for the following questions. K_a1=2.7x10^-5 K_a2=2.5x10^-9

Question 1

What is the pH of H₂SeO₃?

(A) 2.43

(B) 1.25

(C) 3.16

(D) None of the above

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Question 2

What is the concentration of H₊?

(A) 0.71M

(B) 0.037M

(C) 0.0037M

(D) None of the above

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Question 3

What is the concentration of HSeO₃^-?

(A) 0.037M

(B) 0.0037M

(C) 0.71M

(D) None of the above

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Question 4

What is the concentration of H₂SeO₃?

(A) 0.46M

(B) 0.49M

(C) 0.50M

(D) None of the above

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Question 5

What is the concentration of OH^-?

(A) 2.7x10^-12

(B) 2.7x10^-13

(C) 1.4x10^-14

(D) None of the above

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Question 6

What is the concentration of SeO₃^2-?

(A) 2.7x10^-5M

(B) 3.5x10^-5M

(C) 2.5x10^-9M

(D) None of the above

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