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Chemie

V čisté vodě, kde při teplotě 25°C je koncentrace (H3O+) = (OH-) = 10-7 mol.dm-3 je hodnota pH:

V čisté vodě, kde při teplotě 25°C je koncentrace (H₃O+) = (OH-) = 10^-7 mol.dm^-3 je hodnota pH: