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VHCl=0,6 dm3
CmolHCl=0,001 mol/dm3
n = Cmol x V = 6 x 10^-4 mola HCl
Vc - objętość całkowita
Vc= 0,6 + 2 = 2,6 dm3
C = n/V = 6x10^-4 / 2,6 = 2,31 x 10^-4 mol/dm3 = [H+]
pH = -log[H+] = -log ( 2,31 x 10^-4 ) = 3,64