Compound A when dissolved in water gives compound B which is used in white washing. Compound B reacts with carbon dioxide to form a white precipitate of compound C . Identify compounds A ,B and C . Also write the equations involved.
please answer fast
Answers
Explanation:
Compound A reacts with water and gives compound B which is used in whitewashing.
Compound A + water → Compound B (used in white washing)
The substance used for white washing is CaO (Calcium Oxide).
Therefore, compound A is Calcium oxide having formula CaO.
\sf{CaO+H_2O\rightarrow Ca(OH)_2}CaO+H
2
O→Ca(OH)
2
So, compound B is Calcium Hydroxide (another name - Slaked lime) having formula Ca(OH)2.
The above reaction is an example of a Combination Reaction. Because in it two or more reactants combine to form a single product.
Now, compound B reacts with carbon dioxide to form a white precipitate of compound C.
Compound B + Carbon dioxide → Compound C (which forms white precipitate)
\sf{Ca(OH)_2+CO_2\rightarrow CaCO_3+H_2O}Ca(OH)
2
+CO
2
→CaCO
3
+H
2
O
Therefore, compound C is Calcium Carbonate.
The above reaction is an example of a Double Displacement Reaction. Because the exchange of ions takes place. Also, known as Precipitation Reaction, as the formation of precipitate takes place.