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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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dbomb1 dbomb1
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A month ago
Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with  Ka1 = 2.5 × 10–4,  Ka2 = 5.6 × 10–8, and  Ka3 = 3 × 10–13. What is the pH of a 0.500  M solution of arsenic acid?


▸ 0.85

▸ 1.95

▸ 3.90

▸ 4.51

▸ None of these answers is correct.
Textbook 
Chemistry: Atoms First

Chemistry: Atoms First


Edition: 4th
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elixy19elixy19
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