... 0, 039 05 0,08 1, 9. 10 3 0, 039 05 C > L CO2 + H2O H+ + HCO 3 ; 10 6 ,35 (do Ka1 >> Ka2) C 3, 0 10 2 1, 9. 10 3 3, 0 10 2 x 1, 9. 10 3 + x x = 10 6 ,35 ... = 7,05 .10 6 << 1, 9. 10 3 [H+] = 1, 9 .10 3 Vậy pH = lg 1, 9. 10 3 = 2,72 3. C = = 0, 039 05 0, 03 91 CaSO4 Ca2+ + SO42 ; KS1 = 10 5,04 x x x = KS1 = 10 2,52 ... = = 10 2,82 CO 3 2 + H2O HCO 3 + OH ; 10 3, 67 (do Kb1 >> Kb2) C 0, 03 91 [ ] 0, 03 91 x x x = 10 3, 67 x = 2,89 .10 3 10 2,4 10 2 0,07 81 CO 3 2...