Question

Як здийсныти перетворення: а) C -CO2 - CO - CO2 - CaCO3 - CaCl2 б)C - CO2 - CO - CO2 - CaCO3 - CO2 в)Si - SiO2 - K2SiO3 - Si02 г)Si - Na2SiO3 -SiO2 д)Si - Na2SiO3 - NaCl

Answer 1

1) C + O2 = CO2

CO2+C = 2CO

CO + ZnO = Zn + CO2

CO2 + CaO = CaCO3

CaCO3 + 2HCl = CaCl2 + CO2 + H2O

2) Во второй цепочке так же как в первой только последняя реакция:

CaCO3 = CaO + CO2

3) Si + O2 = SiO2

SiO2 + 2KOH = K2SiO3 + H2O

K2SiO3 = K2O + SiO2

4) Si + 2NaOH = Na2SiO3 + H2

Na2SiO3 = Na2O + SiO2

5)Si + 2NaOH = Na2SiO3 + H2

Na2SiO3 + 2HCl = 2NaCl + H2SiO3

Answer 2

Transformation: C -> CO2 -> CO -> CO2 -> CaCO3 -> CaCl2

The transformation you mentioned involves several steps. Let's break it down:

a) C -> CO2: - Carbon (C) reacts with oxygen (O2) to form carbon dioxide (CO2) through combustion or oxidation reactions [[1]].

b) CO2 -> CO: - Carbon dioxide (CO2) can be reduced to carbon monoxide (CO) through various processes, such as the reaction with carbon or the use of catalysts [[2]].

c) CO -> CO2: - Carbon monoxide (CO) can be oxidized back to carbon dioxide (CO2) through combustion or reaction with oxygen [[3]].

d) CO2 -> CaCO3: - Carbon dioxide (CO2) can react with calcium hydroxide (Ca(OH)2) to form calcium carbonate (CaCO3) through a process called carbonation [[4]].

e) CaCO3 -> CaCl2: - Calcium carbonate (CaCO3) can be converted to calcium chloride (CaCl2) through the reaction with hydrochloric acid (HCl) [[5]].

Please note that the reactions mentioned above are simplified representations of the transformations. The actual reactions may involve specific conditions, catalysts, or additional reactants.

Transformation: C -> CO2 -> CO -> CO2 -> CaCO3 -> CO2

Here's a breakdown of the transformation you mentioned:

a) C -> CO2: - Carbon (C) reacts with oxygen (O2) to form carbon dioxide (CO2) through combustion or oxidation reactions [[1]].

b) CO2 -> CO: - Carbon dioxide (CO2) can be reduced to carbon monoxide (CO) through various processes, such as the reaction with carbon or the use of catalysts [[2]].

c) CO -> CO2: - Carbon monoxide (CO) can be oxidized back to carbon dioxide (CO2) through combustion or reaction with oxygen [[3]].

d) CO2 -> CaCO3: - Carbon dioxide (CO2) can react with calcium hydroxide (Ca(OH)2) to form calcium carbonate (CaCO3) through a process called carbonation [[4]].

e) CaCO3 -> CO2: - Calcium carbonate (CaCO3) can be decomposed into carbon dioxide (CO2) through heating or reaction with acids [[6]].

Transformation: Si -> SiO2 -> K2SiO3 -> SiO2

The transformation you mentioned involves the following steps:

a) Si -> SiO2: - Silicon (Si) can react with oxygen (O2) to form silicon dioxide (SiO2) through a process called oxidation [[7]].

b) SiO2 -> K2SiO3: - Silicon dioxide (SiO2) can react with potassium hydroxide (KOH) to form potassium silicate (K2SiO3) through a reaction known as silicate formation [[8]].

c) K2SiO3 -> SiO2: - Potassium silicate (K2SiO3) can be decomposed into silicon dioxide (SiO2) through heating or reaction with acids [[9]].

Transformation: Si -> Na2SiO3 -> SiO2

The transformation you mentioned involves the following steps:

a) Si -> Na2SiO3: - Silicon (Si) can react with sodium hydroxide (NaOH) to form sodium silicate (Na2SiO3) through a reaction known as silicate formation [[10]].

b) Na2SiO3 -> SiO2: - Sodium silicate (Na2SiO3) can be decomposed into silicon dioxide (SiO2) through heating or reaction with acids [[11