Question

The diagram below illustrates an experiment set up to investigate the effect of heat on copper (II) carbonate. Study it and answer the questions that follow.

1. Give the expected observation in each test tube.
2. Write an equation for the change that occurs in tube X 

Answer 1

1. X - green copper (II) carbonate changes to black copper (ii) oxide.
   Y - The colorless solution of limewater turns to a white ppt. 
2. CuCO_3(s)      → CuO_(s)  +  CO_2(g)