What do you observe when: (i) dilute hydrochloric acid is added to silver nitrate solution. (ii) zinc carbonate is heated in a test tube. (iii) a piece of magnesium ribbon is heated over a flame.
Answers
Explanation:
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
Explanation:
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