Quiz 3
- a)
- v1:weak acid Ka=1.8*10-4 [H+]=(1.8*10-4*.03)1/2=2.3*10-3;5% of Ci=1.5*10-3 so approx is invalid
- v1:weak acid Ka=3.5*10-4 [H+]=(3.5*10-4*.001)1/2=5.5*10-4;5% of Ci=5*10-5 so approx is invalid
- b)
- v1:weak base Kb=1.3*10-3 [OH-]=(1.3*10-3*.01)1/2=3.6*10-3;5% of Ci=5*10-4 so approx is invalid
- v2:weak base Kb=6.4*10-4 [OH-]=(6.4*10-4*.2)1/2=1.1*10-2;5% of Ci=1*10-2 so approx is invalid