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When carbon dioxide gas is passed through an aqueous solution of calcium hydroxide, a white precipitate of calcium carbonates is formed, along with water. What inference can be drawn from this chemical reaction? 

When carbon dioxide gas is passed through an aqueous solution of calcium hydroxide, a white precipitate of calcium carbonates is formed, along with water. What inference can be drawn from this chemical reaction?  Correct Answer Metal carbonates are insoluble in water. 

The correct answer is Metal carbonates are insoluble in water. 

Concept:

Double displacement reaction: 

  • It is a chemical reaction in which two compounds react and exchange their ions forming new products. 
  • This reaction often results in the formation of an insoluble compound called a precipitate. 

Explanation:

When carbon dioxide gas is passed through an aqueous solution of calcium hydroxide, the following chemical reaction takes place: 

CO2 + Ca(OH)2 → CaCO3 ↓ + H2O

A white precipitate of calcium carbonates is formed, along with water.

This is an example of a double displacement reaction. 

The precipitate CaCO3 (metal carbonate) is insoluble in water. 

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