Among MgSO4 and BaSO4 which one is more soluble in water at room temperature? Why?
Answer:
MgSO4 is more soluble than BaSO4 in water at room temperature because among the sulphates of alkaline earth metals the decrease in hydration energy down the group is more rapid than the decrease in lattice energy down the group.
Which one between (a) BaSO4 and (b) BaCO3 will be soluble in Hydrochloric Acid?
Answer:
It is BaCO3 that will be soluble in HCl, as it will release H2CO3, a weaker acid than HCl, while BaSO4 will release H2SO4, a stronger acid that HCl.
BaCO3 + 2HCl = H2CO3 + BaCl2 is possible as a stronger acid releases a weaker acid.
BaSO4 + 2HCl = H2SO4 + BaCl2 is not possible as a weaker acid is releasing a stronger acid.
Top
