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b. [H+] = [M] = 0,1 mol /0,2 liter = 0,5 M
c. [OH-] = [M] = 0,01 mol / 0,5 liter = 0,02 M
d.massa Ca(OH)2 = 7,4 mgram
Mr Ca(OH)2 = 74
M Ca(OH)2 = 7,4 mg / 74 mgr/mmol x 1/100 = 0,001 M = 10⁻³ M
[OH-] = 2 x M = 2 x 10⁻³ = 2 x 10⁻³ M
e. [H+] = α.M = 0,12 x 0,001 mol/1 liter = 1,2 x10⁻⁴ M