Which of the following is the expression for the solubility product of copper(II) hydroxide?  

You have 500.0 mL of a buffer solution containing 0.30 M ammonia (NH3) and 0.20 M ammonium chloride (NH4Cl).  What will the pH of this solution be after the addition of 20.0 mL of 1.00 M NaOH solution?  [Kb = 1.8 x 10-5]

The solubility of lead(II) fluoride, PbF2, in pure water is 2.1 × 10‑3 moles per liter.  Cal­culate the value of Ksp for lead(II) fluoride from this data. 

Arsenic acid, H3AsO4, is used industrially to manufacture insecticides. Arsenic acid is a polyprotic acid with K1 = 2.5 × 10–4, K2 = 5.6 × 10–8, and K3 = 3 × 10–13. What is the concentration of the HAsO42– in a solution whose initial arsenic acid concentration was 0.35 M?  

What is the pH of a solution that consists of 0.50 M H2C6H6O6 (ascorbic acid) and 0.75 M NaHC6H6O6 (sodium ascorbate)? For ascorbic acid, Ka = 6.8 × 10–5  

Which species is amphoteric?

Which 0.1 M solution would be the most acidic?

What is the pH of a 0.010 M triethanolammonium chloride, (HOC2H2)3NHCl, solution?   Kb, ((HOC2H2)3N) = 5.9 × 10–7  

Which species is amphoteric?

The pH at the equivalence point of the titration of nitric acid solution by sodium hydroxide solution is