Question 1
Selenous acid, H2SeO3 has acid dissociation constants Ka1 = 3.5 × 10-2 and Ka2 = 5 × 10-8. When 25.00 mL of 0.100 M selenous acid is titrated with 0.200 M NaOH the first equivalence point occurs at pH = ________.Question 2
At 25°C calcium fluoride has a solubility product constant Ksp = 3.5 × 10-11. The solubility of CaF2 at this temperature is ________ mol/L.Answer 1
4.2Answer 2
2.1 × 10-4