Question

Larutan 0,74 gram Ca(OH)²(Mr=74) dalam 2 liter air, mempunyai harga pH ??

Answer 1

[Ca(OH)2] = 0,74/74 ×1000/2000=0,005 M
=5×10-3
[OH]- = 2×5×10-3
=10-2(pangkat)
pOH=-log 10-2
=2
pH=14 - 2
=12