pH = –lg[H+]
[H+]•[OH–] = 10–14
[H+] = 10–14/[ОH–] = 10–14/2•10–9= 0,5•10–5
pH = –lg[H+] = –lg0,5•10–5= 5– lg0,5
pH = –lg[H+]
[H+]•[OH–] = 10–14
[H+] = 10–14/[ОH–] = 10–14/2•10–9= 0,5•10–5
pH = –lg[H+] = –lg0,5•10–5= 5– lg0,5