Question

Са → СаО→ Са(ОН)2→ СаСl2 → Ca

Answer 1

Ответ:

Объяснение:

2Ca + O2 = 2CaO

CaO + H2O = Ca(OH)2

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

CaCl2 + 2K = 2KCl + Ca

Answer 2

It looks like you've listed a sequence of chemical reactions involving calcium (Ca) and various compounds. Here's the interpretation of the reactions:

1. Ca (Calcium metal)
2. CaO (Calcium Oxide, also known as quicklime) - Calcium reacts with oxygen in the air to form calcium oxide.
3. Ca(OH)2 (Calcium Hydroxide, also known as slaked lime) - Calcium oxide reacts with water to form calcium hydroxide in a process called slaking.
4. CaCl2 (Calcium Chloride) - Calcium hydroxide reacts with hydrochloric acid (HCl) to produce calcium chloride and water.
5. Ca (Calcium metal) - This seems to refer back to calcium, indicating that the sequence ends where it started.

Please note that these reactions are simplified, and in actual chemical reactions, there might be specific conditions, stoichiometric ratios, and other factors to consider. Additionally, the "Ca" at the end could signify the recovery or isolation of calcium from calcium chloride, completing a cycle.