Question

References Use the References to access important values if needed for this question. Without doing any calculations (just compare the correct Ksp values) complete the following statements: __ 1. iron(II) sulfide is MORE soluble than 2. iron(II) sulfide is LESS soluble than A. BaSO4 B. PbS C. CaF2 D. BaF Submit Answer w w www wwwwww w wwwww www

Answer 1

Salts	Ksp
FeS	6 * 10-19
BaSO4	1.1 * 10-10
PbS	3 * 10-28
CaF2	5.3 * 10-9
BaF2	1.0 * 10-6

The more soluble substance has a higher K_SP

Thus the salt having a higher K_sp value than FeS is more soluble than FeS

and the substance which has a lower K_sp value is less soluble.

1. Iron(II)sulfide is more soluble than PbS

2. Iron(II)sulfide is less soluble than BaF_2, CaF_{2 ,}BaSO₄

BaF₂> CaF₂ >BaSO₄