Author Question: A weak acid, HF, is in solution with dissolved sodium fluoride, NaF. If HCl is added, which ion will ... (Read 89 times)

krzymel · **on:** Mar 21, 2021

Question 1

A titration of 200.0 mL of 1.05 M H₂A was done with 1.00 M NaOH. For the diprotic acid H₂A, K_a1 = 2.5 × 10^–5, K_a2 = 3.1 × 10^–9. Calculate the pH before any 1.00 M NaOH has been added.

◦ 11.71
◦ 4.58
◦ 9.42
◦ 9.16
◦ 2.29

Question 2

A weak acid, HF, is in solution with dissolved sodium fluoride, NaF. If HCl is added, which ion will react with the extra hydrogen ions from the HCl to keep the pH from changing?

◦ OH^–
◦ Na⁺
◦ F^–
◦ Na^–
◦ None of these are correct.

wtf444 · **Reply #1 on:** Mar 21, 2021

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