Question

С --- Mg2С --- СO2 --- СаСO3 --- Са(НСO3) --- СO2

Answer 1

1 4Mg + C2 → 2Mg2C

2 Mg2C + 2O2 → 2MgO + CO2

3 2Ca + 3CO2 → 2CaCO3

4 CaCO3+ CO2+H2O---> Ca(HCO3)2

5 Ca(HCO3)2----> CaCO3+CO2+H2O (над стрелкой: t)

Answer 2

It seems like you've provided a sequence of chemical reactions involving carbon (C), magnesium carbonate (Mg2CO3), carbon dioxide (CO2), calcium carbonate (CaCO3), and calcium bicarbonate (Ca(HCO3)2). Let's break down these reactions step by step:

1. C: Carbon is typically in the form of graphite or diamond in nature. It can react with various substances under appropriate conditions.

2. Mg2CO3: Magnesium carbonate is a compound made up of magnesium (Mg), carbon (C), and oxygen (O). It can decompose when heated to produce magnesium oxide (MgO) and carbon dioxide (CO2):

   Mg2CO3 → MgO + CO2

3. CO2: Carbon dioxide is a gas that can be produced in various chemical reactions. In this context, it's generated as a product of the magnesium carbonate decomposition.

4. CaCO3: Calcium carbonate is a common compound found in minerals like limestone and chalk. It can also decompose when heated to produce calcium oxide (CaO) and carbon dioxide (CO2):

   CaCO3 → CaO + CO2

5. Ca(HCO3)2: Calcium bicarbonate is a compound formed when carbon dioxide dissolves in water containing calcium carbonate. It results in the formation of calcium ions (Ca²⁺) and bicarbonate ions (HCO3⁻):

   CaCO3 + CO2 + H2O → Ca(HCO3)2

6. CO2: Carbon dioxide is again produced in this step as a result of the dissolution of calcium carbonate in water.

These reactions represent transformations of carbon and carbonates under various conditions. If you have specific questions or need more information about any part of these reactions, please feel free to ask.