17-4 Weak Base

1. What is the concentration of OH^- in 0.10M of ethylamine (C₂H₅NH₂)?

K_b=6.4x10^-4

2. What is the concentration of OH^- in 0.005M of ethylamine (C₂H₅NH₂)?
3. Which solution is more basic, 0.10M of ethylamine or 0.01M of NaOH?
4. A solution of NH₃ has a pH of 10.25. What is the concentration of the solution?

K_b=1.8x10^-5

5. If 1.06g of Na₂CO₃ is dissolved in plenty of water to make 1.0L of solution, what is the pH of the solution? K_b=1.8x10^-4