Question

Ca→ CaO → Ca(OH)2 → CaSO3→ SO₂​

Answer 1

1. 2Ca+O2=2CaO

2. CaO+H2O=Ca(OH)2

3. Ca(OH)2+H2SO3=CaSO3+2H2O

4. CaSO3=CaO+SO2

Answer 2

The sequence of chemical reactions you've provided seems to depict the conversion of calcium (Ca) to sulfur dioxide (SO₂) through several intermediate compounds. Let's break down each step:

1. Ca → CaO (Calcium to Calcium Oxide):

   • In this step, calcium (Ca) reacts with oxygen (O₂) to form calcium oxide (CaO). This is a common reaction for metals like calcium when they are exposed to oxygen.

2. CaO → Ca(OH)₂ (Calcium Oxide to Calcium Hydroxide):

   • Calcium oxide (CaO) reacts with water (H₂O) to form calcium hydroxide (Ca(OH)₂). This is an exothermic reaction, and calcium hydroxide is a strong base.

3. Ca(OH)₂ → CaSO₃ (Calcium Hydroxide to Calcium Sulfite):

   • In this step, calcium hydroxide (Ca(OH)₂) reacts with sulfur dioxide (SO₂) to form calcium sulfite (CaSO₃).

4. CaSO₃ → SO₂ (Calcium Sulfite to Sulfur Dioxide):

   • Calcium sulfite (CaSO₃) can be further reacted or decomposed to produce sulfur dioxide (SO₂).

Overall, this sequence represents a series of chemical reactions starting with calcium and ultimately leading to the formation of sulfur dioxide. It's important to note that specific reaction conditions, such as temperature and pressure, may influence the efficiency and direction of these reactions.