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Science Clinic => Chemistry => Topic started by: daltonest1984 on Mar 21, 2021

Title: When 2.4 102 mol of nicotinic acid (a monoprotic acid) is dissolved in 350 mL of water, the pH is ...
Post by: daltonest1984 on Mar 21, 2021

Question 1

What is the pOH of pure water at 20^oC? (K_w at 20^oC = 6.87 × 10^–15)

◦ 6.918
◦ 7.000
◦ 14.000
◦ 14.163
◦ 7.082

Question 2

When 2.4 × 10^–2 mol of nicotinic acid (a monoprotic acid) is dissolved in 350 mL of water, the pH is 3.05. Calculate the K_a of nicotinic acid.

◦ 1.3 × 10^–2
◦ 1.2 × 10^–5
◦ 6.8 × 10^–2
◦ 3.4 × 10^–5
◦ None of these are correct.

Title: When 2.4 102 mol of nicotinic acid (a monoprotic acid) is dissolved in 350 mL of water, the pH is ...
Post by: bfulkerson77 on Mar 21, 2021

Answer 1

7.082

Answer 2

1.2 × 10^–5