Write balanced chemical equations section for the following (a) Sodium + Sulphuric acid - Sodium sulphate+ hydrogen (b) Calcium carbonate on reaction with hydrochloric acid gives calcium chloride water and carbon c) when lead nitrate is heated, it forms lead oxide origen and brown fumes of nitrogen dioxide. d) when copper is heated in air. e) when aluminium is heated in air. (f) aluminium oxide react with sodium hydroxide
Answers
Answer:
(i) When dilute hydrochloric acid is added to lead nitrate solution. white ppt of lead chloride appears.
Pb(NO
3
)
2
+HCl→PbCl
2
+2HNO
3
(ii) When barium chloride reacts with sodium sulphate solution, white ppt of barium sulphate is obtained.
BaCl
2
+Na
2
SO
4
→BaSO
4
+2NaCl
(iii) When conc. sulphuric acid is added to sugar crystals sugar charcoal is formed. Sugar charcoal is a black spongy mass. Conc. sulphuric acid is a super dehydrating agent and it sucks up all the water from the sugar.
(iv) When dilute hydrochloric acid is added to copper carbonate carbon dioxide is evolved.
CuCO
3
+HCl→CuCl
2
+H
2
O+CO
2
(v) When dilute hydrochloric acid is added to sodium thiosulphate sulphur dioxide gas is released.
Na
2
S
2
O
3
+2HCl→2NaCl+SO
2
+H
2
O+S
Answer:
Hey mate
Plz subscribe on YouTube
The knowledge Pyramid
plz subscribe it now