Find the pH of a Sol that is 0.15 M HCOOH (Ka = 1.8e-4) and 0.45 M in HCN (KA = 4.9e-10).

Question

Options are 3.87, 2.28, 4.38, 3.05, 4.13
I only that we use handerson eq but there’s two Ka given.

Answer 1

Answers for AP Chemistry Partner Quiz (I have a PDF of the answer key if you don't fully believe me)

1. E
2. C
3. D
4. C
5. B
6. A
7. C
8. D
9. A
10. A
11. D
12. B
13. E
14. C
15. B
16. D
17. C
18. E
19. D
20. D
21. A
22. A
23. B
24. E
25. B

Answer 2

Which question is that for?

Answer 3

Who suggested that you should use the Henderson-Hasselbalch equation? I'm not sure that is the proper approach. If you still need help I can show you how to do it. By the way, since you have received some unasked for answers from another, please go to a post just above yours from JOHN and read a comment I made to that. You want to learn how to use spurious answers properly.