Question

The minerals anhydrite, CaSO4, and gypsum, CaS04 . H20, are common accessory minerals in some sedimentary rocks. CaS04 will dissolve in groundwater and the equilibrium constant for the resulting concentrations is (Ca2+)(SO) = 10-45 (CaSO4) If there is an additional source of calcium (e.g., calcite, CaCO3) in the aquifer material O calcium, Ca2+, concentration in solution will be lower CaS04 will be more soluble than if CaS04 were the only source of Ca2 O the additional mineral won't have any effect on CaSO4 solubility CaS04 will be less soluble than if CaS04 were the only source of Ca2+

Answer 1

Adding CaCO3 is like adding CO32- which is a product

Adding product will shift the reaction in the direction of reactant as per Le chatelier Principle

So, Equilibrium moves to reactant side

So, solubility will decrease

Answer: option 4