Question

Determine the pH of the aqueous solutions listed below (acid, alkaline, neutral or close to neutral *). Explain your answer briefly. The concentrations of the electrolyte solutions are 0.1 mol/dm3.
NH4Cl and NaOH solutions were mixed in a volume ratio of 2:1 (Ka (NH4 +) = 6 .10-10)

Na2CO3 and NaHCO3 solutions were mixed in a ratio of 1:2 (Ka (CO2.H2O) = 4 .10-7, Ka (HCO3-) = 5.10-11)

CH3COONa and NaCl solutions were mixed in a volume ratio of 1:1 (Ka (CH3COOH) = 1.6 .10-5)

HF and HCl solutions were mixed in a volume ratio of 2:1 (Ka (HF) = 6 .10-4)