9. What is the pH of a 25 mL solution of 1.0 M potassium fluoride (KF)? The Ka...

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Question

9. What is the pH of a 25 mL solution of 1.0 M potassium fluoride (KF)? The K_a of hydrofluoric acid (HF) is 7.2 x 10^-4.

A. 6.5

B. 7.4

C. 8.6

D. 9.9

10. What is the concentration of arsenate ions in 3.5 M solution of arsenic acid (H₃AsO₄)?

K_a1= 5.0 x 10^-3

K_a2= 9.3 x 10^-8

K_a3= 3.0 x 10^-12

A. 2.1 x 10^-18M

B. 9.3 x 10^-8M

C. 1.2 x 10^-6M

D. 3.0 x 10^-12M

*Please answer both* Thank you!

science chemistry

Answer 1

Answer #1

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Answer 2

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