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Dit : pH ?
Jawab :
L(OH)2 ---> L^+2 + 2OH^-1
L(OH)2 : L^+2 : OH^-1
1 : 1 : 2 ---> perbandingan koefisien
cari langsung [OH^-1] = konsentrasi OH :
[OH^-1] = 2 x 5x10-4 = 10 x 10^-4 = 10^-3
pOH = 3
pH = 14 - pOH
= 14 - 3 = 11 <--
semoga membantu :)