Question

1.C→CO2→H2CO3→MgCO3→ MgCl2 2.Ca→CaO→Ca(OH)2→CaCl2→CaCO3→CaO

Answer 1

Ответ:

1. C + O2(изб.) = CO2

CO2 + H2O = H2CO3

H2CO3 + MgCl2 = MgCO3↓ + 2HCl

MgCO3 + 2HCl = MgCl2 + H2O + CO2↑

2. 2Ca + O2 = 2CaO

CaO + H2O = Ca(OH)2

Ca(OH)2 + 2HCl = CaCl2 + 2H2O

CaCl2 + Na2CO3 = CaCO3↓ + 2NaCl

CaCO3 = CaO + CO2↑

Answer 2

It looks like you've provided a series of chemical reactions involving different compounds. The reactions appear to involve carbon (C), carbon dioxide (CO2), water (H2O), magnesium carbonate (MgCO3), magnesium chloride (MgCl2), calcium (Ca), calcium oxide (CaO), calcium hydroxide (Ca(OH)2), and calcium chloride (CaCl2).

Here's a breakdown of the reactions you've listed:

1. C→CO2→H2CO3→MgCO3→MgCl2:

• Carbon (C) reacts with oxygen (O2) to form carbon dioxide (CO2).
• Carbon dioxide (CO2) dissolves in water (H2O) to form carbonic acid (H2CO3).
• Carbonic acid (H2CO3) reacts with magnesium carbonate (MgCO3) to form magnesium bicarbonate (Mg(HCO3)2).
• Magnesium bicarbonate (Mg(HCO3)2) reacts with magnesium chloride (MgCl2).

2. Ca→CaO→Ca(OH)2→CaCl2→CaCO3→CaO:

• Calcium (Ca) undergoes heating to form calcium oxide (CaO), also known as quicklime.
• Calcium oxide (CaO) reacts with water (H2O) to form calcium hydroxide (Ca(OH)2), also known as slaked lime.
• Calcium hydroxide (Ca(OH)2) reacts with calcium chloride (CaCl2).
• Calcium chloride (CaCl2) reacts with calcium carbonate (CaCO3) to form calcium chloride and calcium carbonate (CaCO3).
• Calcium carbonate (CaCO3) undergoes heating to regenerate calcium oxide (CaO).

Please note that while the reactions you've provided are correct in terms of the general chemical processes, the actual reaction conditions and reaction mechanisms may vary. If you have specific questions or if you'd like more detailed information about these reactions, feel free to ask!