Question

Са→СаО→Са(ОН)2→СаСl2.

Answer 1

Ca - CaO - Ca(OH)2 - CaCl2 - CaCO3 - Ca
2Са + О2 = 2СаО
СаО + Н2О = Са(ОН)2
Са(ОН)2 + 2НCl = СаCl2 + 2Н2О
СаCl2 + Na2CO3 = 2NaCl + CaCO3 (осадок, стрелка вниз)
CaCO3 + Ba = BaCO3 + Ca
Это то?

Answer 2

The series of chemical reactions you provided involves the transformation of calcium (Ca) to calcium chloride (CaCl2) through a series of steps involving the formation of calcium oxide (CaO) and calcium hydroxide (Ca(OH)2). Here is a breakdown of the reactions:

1. Formation of Calcium Oxide (CaO): Ca(s) + O2(g) → CaO(s)

   In this reaction, solid calcium (Ca) reacts with oxygen gas (O2) to produce solid calcium oxide (CaO).

2. Formation of Calcium Hydroxide (Ca(OH)2): CaO(s) + H2O(l) → Ca(OH)2(s)

   Calcium oxide (CaO) reacts with water (H2O) to produce calcium hydroxide (Ca(OH)2) in a solid state.

3. Formation of Calcium Chloride (CaCl2): Ca(OH)2(s) + 2HCl(aq) → CaCl2(aq) + 2H2O(l)

   Calcium hydroxide (Ca(OH)2) reacts with hydrochloric acid (HCl) to yield calcium chloride (CaCl2) in an aqueous solution along with water (H2O).

So, the overall reaction sequence can be summarized as follows: Ca(s) + O2(g) → CaO(s) CaO(s) + H2O(l) → Ca(OH)2(s) Ca(OH)2(s) + 2HCl(aq) → CaCl2(aq) + 2H2O(l)

Please note that these reactions are simplified and may not reflect the complete set of conditions or stoichiometry.