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An excess of copper oxide is added to ensure that all the sulfur present in the original sample reacts to form copper sulfide. This is important for accurate determination of sulfur content in the sample, as any unreacted sulfur would lead to an underestimate of sulfur content. The excess copper oxide also helps to ensure complete combustion of the sample.
What else can I help you with?
What happens if you add hydrocloric acid to copper oxide?
When hydrochloric acid is added to copper oxide, a chemical reaction occurs where the acid reacts with the oxide to form copper chloride and water. The balanced equation for this reaction is: CuO(s) + 2HCl(aq) -> CuCl2(aq) + H2O(l) The copper oxide is dissolved in the acid to form a blue-green solution of copper chloride.
What is the reaction for Reduction of copper oxide by hydrogen?
The reaction for the reduction of copper oxide by hydrogen is as follows: CuO(s) + H2(g) -> Cu(s) + H2O(g)
What happens when sulphuric acid and black copper oxide heated gently?
When sulfuric acid reacts with black copper oxide and is heated gently, the copper oxide is reduced to copper and water is formed. The reaction can be represented as follows: CuO (s) + H2SO4 (aq) → Cu (s) + H2O (l) + SO2 (g)
When hydrogen gas passed over heated cupric oxide?
When hydrogen gas passed over heated cupric oxide, the hydrogen is oxidized and displaces copper from the copper oxide as metallic copper, because hydrogen is higher than copper in the electromotive series. Water vapor is also produced by the reaction.
Is copper oxide a basic or amphoteric oxide?
amphoteric, it reacts with an acid or a base to form a salt and water (a neutralisation reaction) ZnO(s) + 2HCL (aq) = ZnCl2(aq) + H2O(l) ZnO (s) + 2OH- (aq) = ZnO22-(s) + H2O(l)
What happens if you add hydrocloric acid to copper oxide?
When hydrochloric acid is added to copper oxide, a chemical reaction occurs where the acid reacts with the oxide to form copper chloride and water. The balanced equation for this reaction is: CuO(s) + 2HCl(aq) -> CuCl2(aq) + H2O(l) The copper oxide is dissolved in the acid to form a blue-green solution of copper chloride.
What does copper oxide plus zinc metal form?
Zn(s) + CuO(s) → ZnO(s) + Cu(s) Copper metal and Zinc Oxide is formed.
What is the reaction for Reduction of copper oxide by hydrogen?
The reaction for the reduction of copper oxide by hydrogen is as follows: CuO(s) + H2(g) -> Cu(s) + H2O(g)
What is left behind in the filter when you mix copper oxide with sulphuric acid?
Copper(s)
When copper oxide is heated in carbon what is produced?
Copper doesn't react with carbon dioxide at room temperature.
What happens when sulphuric acid and black copper oxide heated gently?
When sulfuric acid reacts with black copper oxide and is heated gently, the copper oxide is reduced to copper and water is formed. The reaction can be represented as follows: CuO (s) + H2SO4 (aq) → Cu (s) + H2O (l) + SO2 (g)
What is the balanced equation for copper an oxygen?
There are two different copper oxide formula's:2Cu + O2 -> 2CuO (black Copper(II) oxide)or4Cu + O2 -> 2Cu2O (red Copper(I) oxide)Copper(II) = Cu2+Oxide = O2-CuO or copper(II) oxide
What is balanced euqation for copper oxide with diluted hydrochloric acid?
CuO(s) + 2HCl(aq) --> CuCl2(aq) + H2O(l) Copper oxide + Hydrochloric Acid --> Copper Chloride + Water
Why does copper blue hydroxide change to black copper oxide?
Cu(OH)2 can be regarded as unstable ['copper oxide'-'hydrate'], and as such it easily loses a water (H2O) molecule, eg. when heated:Cu(OH)2(s) --> [CuO.H2O] --> CuO(s) + H2OOnly hydrated copper ions are blue colored.(Compare white CuSO4(s) and blue CuSO4.5H2O(s) )
Symbol equation when copper carbonate is heated?
Here are the equations for the thermal decomposition of copper carbonate (notice that a metal oxide is formed, just as it was with calcium carbonate): Copper carbonate → copper oxide + carbon dioxide CuCO3 → CuO + CO2
What is the formula of copper 2 oxide?
Copper(2)oxide is written as Cu2O.Not that the last alphabet is O for oxygen,not 0 for zero Actually Copper (II) Oxide is written as CuO, because Copper 2 has the charge 2+ and Oxygen has the charge 2-, so they balance each other out evenly. THere is no need for 2 (Cu2)'s.
When hydrogen gas passed over heated cupric oxide?
When hydrogen gas passed over heated cupric oxide, the hydrogen is oxidized and displaces copper from the copper oxide as metallic copper, because hydrogen is higher than copper in the electromotive series. Water vapor is also produced by the reaction.
