In the acid In the acid-base reaction: HCN(aq) + F^-(aq) CN^-(aq) + HF(aq), wher

Question

In the acid

In the acid-base reaction: HCN(aq) + F^-(aq) CN^-(aq) + HF(aq), where Ka (HCN) = 4.9 10?10 and Ka (HF) = 7.2 10?4, the Question 15 options: a) products are favored. b) reactants are favored. Which solution containing an equal number of moles of each of the substances is a buffer? Question 33 options: a) HCl and NaCl b) HNO2 and HNO3 c) HCH3COO and NaCH3COO d) H2CO3 and CO3^2? e) More than one of the solutions above is a buffer. Which buffer solution has the lowest pH? Question 35 options: a) 0.10 M HF and 0.10 M NaF b) 0.20 M HF and 0.20 M NaF c) 0.20 M HF and 0.10 M NaF d) 0.10 M HF and 0.20 M NaF e) All of the buffer solutions described above have the same pH.

Explanation / Answer

1)

b) reactants are favored.

2)

d) H2CO3
and CO32

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