Question

1)Ca->Ca2(OH)->CaO->CaCl2->Ca 2)CuCl2->Cu->CuO->CuCl2->Cu(Oh)2->CuO

Answer 1

Сa + 2H2O = Ca(OH)2 + H2

Ca((OH)2 =t= CaO +H2O

CaO + 2HCl = CaCl2 + H2O

CaCl2 =эл. ток = Сa + Сl2  

 

 

CuCl2 + Mg = Cu + MgCl2

2Cu + O2 =t= 2CuO

CuO +  2HCl = CuCl2 + H2O

CuCl2 + 2NaOH = Cu(OH)2 + 2 NaCl 

Cu(OH)2 =t= CuO + H2O 

 

Answer 2

It appears that you have provided a series of chemical reactions for two different elements, calcium (Ca) and copper (Cu). I'll go through each reaction and provide a brief explanation for each step.

For calcium (Ca):

1. Ca -> Ca2(OH): This reaction represents the formation of calcium hydroxide (Ca(OH)2), which occurs when calcium reacts with water (H2O). The chemical equation should be: Ca + 2H2O -> Ca(OH)2

2. Ca2(OH) -> CaO: This reaction involves the removal of water from calcium hydroxide, resulting in the formation of calcium oxide (CaO). The chemical equation is: Ca(OH)2 -> CaO + H2O

3. CaO -> CaCl2: Here, calcium oxide reacts with hydrochloric acid (HCl) to produce calcium chloride (CaCl2). The chemical equation would be: CaO + 2HCl -> CaCl2 + H2O

4. CaCl2 -> Ca: This reaction represents the reduction of calcium chloride, which is achieved by using a reducing agent, such as sodium (Na) or magnesium (Mg). The chemical equation depends on the specific reducing agent used.

For copper (Cu):

1. CuCl2 -> Cu: This reaction involves the reduction of copper(II) chloride (CuCl2) to elemental copper (Cu). The chemical equation would be: CuCl2 + 2e- -> Cu + 2Cl-

2. Cu -> CuO: This step represents the oxidation of copper to form copper(II) oxide (CuO). The chemical equation is: 2Cu + O2 -> 2CuO

3. CuO -> CuCl2: In this reaction, copper(II) oxide reacts with hydrochloric acid (HCl) to produce copper(II) chloride (CuCl2). The chemical equation is: CuO + 2HCl -> CuCl2 + H2O

4. CuCl2 -> Cu(OH)2: Here, copper(II) chloride reacts with a base, such as sodium hydroxide (NaOH), to form copper(II) hydroxide (Cu(OH)2). The chemical equation would be: CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl

5. Cu(OH)2 -> CuO: This reaction represents the dehydration of copper(II) hydroxide, resulting in the formation of copper(II) oxide (CuO). The chemical equation is: Cu(OH)2 -> CuO + H2O

I hope this clarifies the series of reactions you provided for calcium and copper. If you have any further questions, feel free to ask!