Question

5*10-4M,NaOH溶液的PH值是多少?

Answer 1

5*10-4M,NaOH溶液的PH值是多少?

pOH=-lg5*10-4=3.3 pH=10.7

0.1M,CH3COOH溶液的H离子数是多少?Ka=1.75*10-5

因Ka·C>20Kw 且C/Ka >500,[H+]=(Ka·C)^(1/2)=(1.75*10-5×0.1)^(1/2)=1.33×10-3M

0.01M,CH2Cl.COOH溶液PH值?Ka=1.4*10-3

因Ka·C>20Kw 且C/Ka