11. Which best demonstrates an example of the common ion effect? A)A lighted splint goes out in air but bursts into flame when plunged l Into pure oxygen.

B)The compound Cucl is 500 times less soluble in sea water than it is in pure water.

C) Ammonla is produced commercially when an increase in pressure shifts the equilibrium toward the product.

D The decomposition of carbonic acid in water occurs spontaneously whereas the combination of carbon dloxide and water does not.