【简答题】Calculate the approximate pH value of different solutions below ; (1) A 0.10 M HAc K a (HAc)=1.8×10 -5 (2) A 0.10 M NH 4 Cl K b (NH 3 )= 1.8×10 -5 (3) A mixture solution with 0.05 M NaHCO 3 (50 mL...
【单选题】If the following solutions are at the same concentration of 0.1 mol · L -1 , which is the correct ordering of their pH value? ( Ka( HAC )=1.75 × 10 -5 , Ka( HF )=6.8 × 10 -4 , Ka( HCN )=6.2 × 10 -10 )