State on characteristics of chemical reaction taking place when :
a) Dilute sulphuric acid is made to react with marble chips.
b) Dilute hydrochloric acid is added to a solution of lead nitrate in the cold.
c) Water is added to quick lime
Answers
Answer
1 So when calcium carbonate reacts with sulphuric acid, it forms water, carbon dioxide and calcium sulphate. The reaction between sulfuric acid and calcium carbonate is somewhat similar to the reaction with sodium bicarbonate way - carbon dioxide bubbles out, and the salt is left behind is calcium sulfate.
2 Dilute Hydrochloric acid is added to Lead nitrate Solution and the mixture is heated. ... HCl is added to lead nitrate solution and heated, it forms a white precipitate of lead chloride.
3 When Water is added to quick lime, then a lot of heat is released and heavy fizzing occurs because Slaked lime is fromed ( Calcium Hydroxide). CaO + H₂O → Ca(OH)₂ + heat energy.
When dilute hydrochloric acid is added to sodium carbonate, the evolution of carbon dioxide gas.
Reaction: Na
2
CO
3
+2HCl→2NaCl+H
2
O+CO
2
2. When Lemon juice is added gradually to the potassium permanganate solution changes its colour from purple to colourless.
3. When dilute sulphuric acid is added to the barium chloride solution, the formation of a white precipitate of barium sulphate takes place.
Reaction: BaCl
2
+H
2
SO
4
→BaSO
4
(ppt.)+2HCl
4. When quicklime is treated with water, change in temperature or increase in temperature takes place.
Reaction: CaO+H
2
O→Ca(OH)
2
+Heat
5. When the wax is burned in the form of a candle, change in the state from solid to liquid and gas occurs.
Also, I have attached a reactivity series with this answer if you need it :)
