Answer to Question #100395 in General Chemistry for Himar

Question

g. K₂CO₃ + CaI₂ ➝

Explain how you got the answer please

Answer 1

K₂CO₃ + CaI₂ ➝  CaCO₃+2KI

This is ion exchange raction. So 2 cations of Potassium (K⁺) are substituted with 1 cation of Calcium (Ca²⁺). Calcium carbonate (CaCO3) is insoluble and formation of precipitate shifts equilibrium to the products formation. The reaction was balansed, as there are 2 cations of Potassium (K+) and 2 anions of Iodine (I^-) before arrow should be the same number after arrow, so I put stochiometric koefficient 2 before KI .