Q11 of 152 Page 18

Write the balanced chemical equations for the following reactions:

(a) Calcium hydroxide + Carbon dioxide Calcium carbonate + Water


(b) Aluminium + Copper chloride Aluminium chloride + Copper

(a) Ca(OH)2 +CO2 = CaCO3 + H2O

Calcium hydroxide reacts with Carbon dioxide to give Calcium carbonate and water.


(b) 2Al + 3CuCl2 2AlCl3 + 3Cu


2 moles of aluminum reacts with 3 moles of Copper chloride to give 2 Aluminum chloride and 3 copper element.



More from this chapter

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9

How will you indicate the following effects in a chemical equation?


(a) A solution made in water


 


(b) Exothermic reaction


 


(c) Endothermic reaction

 10 Translate the following statements into chemical equations and then balance the equations :

(a) Hydrogen sulphide gas bums in air to give water and sulphur dioxide.


(b) Phosphorus bums in oxygen to give phosphorus pentoxide.


(c) Carbon disulphide bums in air to give carbon dioxide and sulphur dioxide.


(d) Aluminium metal replaces iron from ferric oxide, Fe203, giving aluminium oxide and iron.


(e) Bi:uiurn chloride reacts with zinc sulphate to give zinc chloride and barium sulphate.

 12 Complete and balance the following equations:

(a) NaOH +....... Na2S04 + H20


(b) Ca(OH)2 +.... CaC03 + H20

 13 Correct and balance the following equations:

(i) Ca + H20 CaOH + H


(ii) N + H NH3