Chemistry chemicals and equations

Question

1. What is the reagent used to convert copper (II) sulphate to copper(II) oxide, as well as the chemical equation of this reaction?

2. What is the chemical equation that converts copper(II) carbonate to copper(II) sulphate?

3. What is observed when calcium oxide pellets and excess water are mixed?

4. What happens when potassium hydroxide is heated with ammonium chloride?

Answer 1

. What is the reagent used to convert copper (II) sulphate to copper(II) oxide, as well as the chemical equation of this reaction?

the reagent is usually NaOH:

run @ room temp, undesired: CuSO4 & 2 NaOH --> Cu(OH)2 & Na2SO4

run @ boiling, desired : CuSO4 & 2 NaOH --> CuO & H2O & Na2SO4

http://books.google.com/books?id=ZkYAAAA...

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2. What is the chemical equation that converts copper(II) carbonate to copper(II) sulphate?

CuCO3 & H2SO4 --> CuSO4  & H2O  & CO2

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3. What is observed when calcium oxide pellets and excess water are mixed?

CaO & H2O --> Ca(OH)2 (white  gel ppt) & a lot of heat

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4. What happens when potassium hydroxide is heated with ammonium chloride?

KOH & NH4CL --> NH3 (g) & H2O (g)  & KCl (s)