copper carbonate neutralises the hydrochloric acid
test formation method:- 1 put 25 ml 1M acid in beaker warm gently don't boil ( remove from heat ) 2 Add the green copper carbonate powder slowly . because co2 is quickly evovled. now stir mixture 3 Continue adding powder until traces of unreacted carbonate left at bottom of beaker 4 now separate unreacted solid from green solution by filtration . 5 pour it in evapourating dish . heat over a water bath to make solution more clear [ you can test it by dipping in a glass rod abd check if crystal form , if they formed cover the dish with piece of filter paper and let solution crystalline naturally ]
