Question

Ca-CaO-Ca(OH)2-CaCO3-CaO-CaSO4-BaSO4

Answer 1

Ca+O2=CaO
Ca(OH)2+CO3=CaCO3+H2O
CaCO3+O2=CaO+CO2
CaSO4+BaO2=BaSO4+CaO

Answer 2

Chemical Reactions:

The given sequence of chemical reactions is as follows: Ca-CaO-Ca(OH)2-CaCO3-CaO-CaSO4-BaSO4. Let's break down each reaction step by step:

1. Ca + 2H2O → Ca(OH)2 + H2 [[1]](https://uchi.ru/otvety/questions/reshite-tsepochku-prevrascheniy-ca-ca-oh-2-caco3-cao-cacl2-ca-t-bao-ba-oh-2-ba-no3-2-nano) - Calcium (Ca) reacts with water (H2O) to form calcium hydroxide (Ca(OH)2) and hydrogen gas (H2).

2. Ca(OH)2 + Na2CO3 → CaCO3 + 2NaOH [[1]](https://uchi.ru/otvety/questions/reshite-tsepochku-prevrascheniy-ca-ca-oh-2-caco3-cao-cacl2-ca-t-bao-ba-oh-2-ba-no3-2-nano) - Calcium hydroxide (Ca(OH)2) reacts with sodium carbonate (Na2CO3) to form calcium carbonate (CaCO3) and sodium hydroxide (NaOH).

3. CaCO3 → CaO + CO2 - Calcium carbonate (CaCO3) decomposes to form calcium oxide (CaO) and carbon dioxide (CO2).

4. CaO + 2HCl → CaCl2 + H2O - Calcium oxide (CaO) reacts with hydrochloric acid (HCl) to form calcium chloride (CaCl2) and water (H2O).

5. CaCl2 → Ca + Cl2 - Calcium chloride (CaCl2) decomposes to form calcium (Ca) and chlorine gas (Cl2).

6. BaO + H2O → Ba(OH)2 [[1]](https://uchi.ru/otvety/questions/reshite-tsepochku-prevrascheniy-ca-ca-oh-2-caco3-cao-cacl2-ca-t-bao-ba-oh-2-ba-no3-2-nano) - Barium oxide (BaO) reacts with water (H2O) to form barium hydroxide (Ba(OH)2).

7. Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O [[1]](https://uchi.ru/otvety/questions/reshite-tsepochku-prevrascheniy-ca-ca-oh-2-caco3-cao-cacl2-ca-t-bao-ba-oh-2-ba-no3-2-nano) - Barium hydroxide (Ba(OH)2) reacts with nitric acid (HNO3) to form barium nitrate (Ba(NO3)2) and water (H2O).

8. Ba(NO3)2 + Na2SO4 → BaSO4 + 2NaNO3 [[1]](https://uchi.ru/otvety/questions/reshite-tsepochku-prevrascheniy-ca-ca-oh-2-caco3-cao-cacl2-ca-t-bao-ba-oh-2-ba-no3-2-nano) - Barium nitrate (Ba(NO3)2) reacts with sodium sulfate (Na2SO4) to form barium sulfate (BaSO4) and sodium nitrate (NaNO3).

Therefore, the final product of the given sequence of reactions is BaSO4 (barium sulfate).