Question

Ca → CaO → Ca(OH)2 → CaSO3 → SO2 → K2SO3 → KCl

Answer 1

 \(2Ca+O_2\underrightarrow{t^o}2CaO\)

 \(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)

 \(Ca\left(OH\right)_2+SO_2\rightarrow CaSO_3+H_2O\)

 \(SO_2+2KOH\rightarrow K_2SO_3+H_2O\)

\(K_2SO_3+2HCl\rightarrow2KCl+SO_2+H_2O\)

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Answer 2

Ca ---(1)---> CaO ---(2)---> Ca(OH)₂ ---(3)---> CaSO₃ ---(4)---> SO₂ ---(5)---> K₂SO₃ ---(6)---> KCl

(1) 2Ca + O₂ ---t^o---> 2CaO

(2) CaO + H₂O ---> Ca(OH)₂.

(3) Ca(OH)₂ + SO₂ ---> CaSO₃ + H₂O

(4) CaSO₃ ---t^o---> CaO + SO₂.

(5) SO₂ + 2KOH ---> K₂SO₃ + H₂O

(6) K₂SO₃ + MgCl₂ ---> 2KCl + MgSO₃.