Question

100 ml larutan Ca(OH)2 0,2 M mempunyai ph....

Answer 1

Gunakan reaksi
Ca²+ + 2 OH- ⇒ Ca(OH)2
cari mol Ca(OH)2
mol = M x V
mol = 0,2 x 0,1 = 0,02

berarti mol OH = 0,04 karena koefisien OH 2
[OH] = mol x 1000/volum
[OH] = 0,04 x 10
[OH] = 4 . 10^-1
pOH = 1 - log 4
pH = 13 + log 4