Question

Осуществите цепочку превращений.А) CaCO3 - CaO - CaC2 - C2H2Б) Si - SiO2 - Na2SiO3 - H2SiOВ) Ca - Ca(OH)2 - CaCO3 - CaO - CaSO4 - CaCl2 - Ca

Answer 1

А) CaCO3=CaO+CO2 термическое разложение
CaO+3C=CaC2+CO
CaC2+2H2O=Ca(OH)2+C2H2
Б) Si+O2=SiO2
SiO2+Na2O=Na2SiO3
Na2SiO3+H2SO4=Na2SO4+H2SiO3
В) Ca+2H2O=Ca(OH)2+H2
Ca(OH)2+CO2=CaCO3+H2O
CaCO3=CaO+CO2 разложение
CaO+H2SO4=H2O+CaSO4
CaSO4+BaCl2=BaSO4+CaCl2
CaCl2+2Rb=2RbCl+Ca

Answer 2

A) CaCO3 - CaO - CaC2 - C2H2

The given chain of transformations involves the compound CaCO3 (calcium carbonate) and ends with the compound C2H2 (acetylene).

1. CaCO3 (calcium carbonate) can be transformed into CaO (calcium oxide) through a process called calcination. During calcination, calcium carbonate is heated, causing it to decompose and release carbon dioxide gas, leaving behind calcium oxide [[1]].

2. CaO (calcium oxide) can react with carbon to form CaC2 (calcium carbide) through a process called the carbide process. In this process, calcium oxide is heated with carbon at high temperatures, resulting in the formation of calcium carbide [[2]].

3. CaC2 (calcium carbide) can react with water to produce C2H2 (acetylene) through a process called hydrolysis. When calcium carbide reacts with water, it undergoes hydrolysis to produce acetylene gas and calcium hydroxide [[3]].

Therefore, the chain of transformations is as follows: CaCO3 - CaO - CaC2 - C2H2.

B) Si - SiO2 - Na2SiO3 - H2SiO

The given chain of transformations involves the element Si (silicon) and ends with the compound H2SiO (silicic acid).

1. Si (silicon) can react with oxygen to form SiO2 (silicon dioxide) through a process called oxidation. Silicon dioxide is a common compound found in nature, such as in quartz and sand [[4]].

2. SiO2 (silicon dioxide) can react with sodium hydroxide (NaOH) to form Na2SiO3 (sodium silicate) through a process called alkaline fusion. In this process, silicon dioxide is fused with sodium hydroxide at high temperatures, resulting in the formation of sodium silicate [[5]].

3. Na2SiO3 (sodium silicate) can react with acid to produce H2SiO (silicic acid). When sodium silicate is treated with acid, it undergoes a neutralization reaction, resulting in the formation of silicic acid [[6]].

Therefore, the chain of transformations is as follows: Si - SiO2 - Na2SiO3 - H2SiO.

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

The given chain of transformations involves the element Ca (calcium) and ends with the element Ca (calcium).

1. Ca (calcium) can react with water to form Ca(OH)2 (calcium hydroxide) through a process called hydration. When calcium reacts with water, it undergoes a chemical reaction to produce calcium hydroxide [[7]].

2. Ca(OH)2 (calcium hydroxide) can react with carbon dioxide (CO2) to form CaCO3 (calcium carbonate) through a process called carbonation. In this process, calcium hydroxide reacts with carbon dioxide in the presence of water to produce calcium carbonate [[8]].

3. CaCO3 (calcium carbonate) can be transformed into CaO (calcium oxide) through a process called calcination. During calcination, calcium carbonate is heated, causing it to decompose and release carbon dioxide gas, leaving behind calcium oxide [[1]].

4. CaO (calcium oxide) can react with sulfur dioxide (SO2) to form CaSO4 (calcium sulfate) through a process called sulfation. When calcium oxide reacts with sulfur dioxide, it undergoes a chemical reaction to produce calcium sulfate [[9]].

5. CaSO4 (calcium sulfate) can react with hydrochloric acid (HCl) to form CaCl2 (calcium chloride) through a process called neutralization. In this process, calcium sulfate reacts with hydrochloric acid to produce calcium chloride [[10]].

6. CaCl2 (calcium chloride) is the final product in the chain of transformations.

Therefore, the chain of transformations is as follows: Ca - Ca(OH)2 - CaCO3 - CaO - CaSO4 - CaCl2 - Ca.