jika KSP CaCO3 = 2,5 x 10-9 Berapa gram CaCO3 ( Mr=100) Yang teerkandung dalam 500 ml larutan jenuh?
TiaHanifah
V = 500 mL = 0,5 L ⇒ Ksp = 27s^4 2,5 x 10^-9 = 27s^4 s^4 = 2,5 x 10^-9 / 27 = 0,9 x 10^-10 s = ⁴√90 x 10^-12 =3,08 x 10^-3 mol/L ⇒ s = n / V = m / Mr x V m = s x Mr x V = 3,08 x 10^-3 x 100 x 0,5 m = 1,54 x 10^-1 gram
⇒ Ksp = 27s^4
2,5 x 10^-9 = 27s^4
s^4 = 2,5 x 10^-9 / 27
= 0,9 x 10^-10
s = ⁴√90 x 10^-12
=3,08 x 10^-3 mol/L
⇒ s = n / V
= m / Mr x V
m = s x Mr x V
= 3,08 x 10^-3 x 100 x 0,5
m = 1,54 x 10^-1 gram
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