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DECOMPOSITION
Copper chloride is not a chemical reaction, it is an ionic compound.
Copper carbonate + Hydrochloric acid ----->Copper chloride + Carbonic acid. CuCO3(aq) + 2HCl(aq)-------->CuCl2(aq) + H2CO3 (aq) Carbonic acid splits to form water and carbon dioxide. H2CO3 (aq)--------> H2O (l) + CO2 (aq) So the reaction could also be written as: CuCO3(aq) + 2HCl(aq)-------->CuCl2(aq) + H2O (l) + CO2 (aq) This type of a reaction is known as a single displacement reaction.
Reduction-Oxidization (Redox) reaction
Rusting is a reduction/oxidation reaction.
DECOMPOSITION
Thermal decomposition.
Copper carbonate is a chemical substance, also called Cupric carbonate. The molecular formula is CuCO3. Copper carbonate decomposes at high temperatures, giving off carbon dioxide and leaving copper(II) oxide.
Copper chloride is not a chemical reaction, it is an ionic compound.
The number of atoms in one formula unit of the more common type of copper carbonate, which has the formula CuCO3, is 5: 3 oxygen atoms and 1 each of copper and carbon.
Copper carbonate + Hydrochloric acid ----->Copper chloride + Carbonic acid. CuCO3(aq) + 2HCl(aq)-------->CuCl2(aq) + H2CO3 (aq) Carbonic acid splits to form water and carbon dioxide. H2CO3 (aq)--------> H2O (l) + CO2 (aq) So the reaction could also be written as: CuCO3(aq) + 2HCl(aq)-------->CuCl2(aq) + H2O (l) + CO2 (aq) This type of a reaction is known as a single displacement reaction.
Reduction-Oxidization (Redox) reaction
Rusting is a reduction/oxidation reaction.
It is the direct combination of two elements or oxidation of copper. 2Cu + O2 = 2CuO its a synthesis reaction!
neutralisation
oxidation
greenium is a compound because it is made up of more than one type of atom