CHEM .........

如果有條題目叫你搵percentage of mass of copper from mixture copper(ii)
carbonate and zinc powder. (mixture已知mass Q )

我咁答可唔可以:

1.add mixture to dil. HCI .
CuCO3 + 2 HCI ----> CuCI2 + H2O +CO3
Zn + 2HCI ---> ZnCI2 + H2
2.CO2 and H2 go out
3.Filtre
residue :CuCL2 and ZnZI2

CuCI2 is blue colour while ZnCI2 is white colour

4. remove all white solid
5. weight the mass of copper (W)
% : W/Q x 100%

唔知COPPER 係咪BLUE 同ZINC 係咪WHITE>>>?????