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0,16g - x mol
x=4,38*10 do potegi -3
400cm³ = 0,4dm³
Cm=4,38*10-3/0,4
Cm=0,01mol/dm³
HCl -> H+ + Cl-
0,01 0,01 0,01
[H+]=0,01mol/dm3
pH=-log[H+]
pH=-log 0,01
pH = 2
wydaje mi sie ze tak bedzie :)