why some bubbles of gas are seen when lead reacts with dilute hydrochloric acid
Answers
During the reaction of some metals with dilute hydrochloric acid, following observations were made.
The temperature of the reaction mixture rises when aluminium (Al) is added.
The reaction of sodium metal is found to be highly explosive.
Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.
On explaining these observations by giving suitable reasons:-
Answer:
The temperature of the reaction mixture rises when aluminium is added because it is an exothermic reaction.
Reaction of sodium metal is found to be highly explosive because it is an exothermic reaction.
When lead is treated with hydrochloric acid, bubbles of hydrogen gas are evolved.
Equation:-
Pb (s)+2Hcl (aq)-----PbCl2 (aq)+H2 (g)
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Answer:
On mixing Lead (Pb) with Hydrochloric Acid (HCl), a gas namely Hydrogen is formed.
Explanation:
The above reaction is given below :-
Pb (s) + 2HCl (aq) ---> PbCl² (l) + H² (g)
This type of reactions are known as Displacement Reaction.
Here, Chlorine is displaced by Lead ,hence, Hydrogen is formed in the above reaction.
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