Question

Ca-->Ca(OH)2-->CaCO3-->CaO-->CaSO4-->CaCl2-->Ca(OH)2

Answer 1

1) Ca +2H2O = Ca(OH)2 + H2

2) CaOH2+CO2 = CaCO3+H2O

3)CaCO3 =t= CaO + CO2 

4) CaO +H2SO4 = CaSO4(осадок) + H2O

5) CaSO4+4СО =700-800 град С= CaS +4СО2

CaS+2HCl(разб)=CaCl2+H2S

6) CaCl2 + 2NaOH = Ca(OH)2 + 2NaCl

Answer 2

Chemical Reactions:

The given sequence of reactions is as follows: Ca --> Ca(OH)2 --> CaCO3 --> CaO --> CaSO4 --> CaCl2 --> Ca(OH)2

Let's break down each reaction and discuss them individually:

1. Ca --> Ca(OH)2: - This reaction involves the conversion of calcium (Ca) to calcium hydroxide (Ca(OH)2). - The reaction can be represented as: Ca + 2H2O -> Ca(OH)2. - Calcium reacts with water to form calcium hydroxide. - 2. Ca(OH)2 --> CaCO3: - This reaction involves the conversion of calcium hydroxide (Ca(OH)2) to calcium carbonate (CaCO3). - The reaction can be represented as: Ca(OH)2 + CO2 -> CaCO3 + H2O. - Calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water. - [[9]](https://portal.tpu.ru/SHARED/v/VVMAMONTOV/Tab1/Obchaya_ximiya.pdf)

3. CaCO3 --> CaO: - This reaction involves the conversion of calcium carbonate (CaCO3) to calcium oxide (CaO). - The reaction can be represented as: CaCO3 -> CaO + CO2. - Calcium carbonate decomposes upon heating to form calcium oxide and carbon dioxide. - 4. CaO --> CaSO4: - This reaction involves the conversion of calcium oxide (CaO) to calcium sulfate (CaSO4). - The reaction can be represented as: CaO + H2SO4 -> CaSO4 + H2O. - Calcium oxide reacts with sulfuric acid to form calcium sulfate and water. - No specific source was found for this reaction.

5. CaSO4 --> CaCl2: - This reaction involves the conversion of calcium sulfate (CaSO4) to calcium chloride (CaCl2). - The reaction can be represented as: CaSO4 + 2HCl -> CaCl2 + H2SO4. - Calcium sulfate reacts with hydrochloric acid to form calcium chloride and sulfuric acid. - No specific source was found for this reaction.

6. CaCl2 --> Ca(OH)2: - This reaction involves the conversion of calcium chloride (CaCl2) back to calcium hydroxide (Ca(OH)2). - The reaction can be represented as: CaCl2 + 2NaOH -> Ca(OH)2 + 2NaCl. - Calcium chloride reacts with sodium hydroxide to form calcium hydroxide and sodium chloride. - No specific source was found for this reaction.

Please note that while some of the reactions are commonly known, specific sources for each reaction were not found in the search results provided.

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