(b) Write down the balanced chemical equation for the following:
(i) When copper is treated with conc. Nitric acid.
(ii) Magnesium ribbon is treated with dil.HCI.
(iii)Sulphur is treated with conc.nitric acid.
(iv)Ammonia is treated with excess chlorine gas.
(v) Sodium thiosulphate is treated with dilute HC1.
Answers
Answer:
Nitric acid reacts with copper according to the reaction:
HNO3(l) + Cu(s) ==> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l)
The copper nitrate salt that forms is a deep blue color.
Magnesium reacts with hydrochloric acid according to the equation:
Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)
This demonstration can be used to illustrate the characteristic reaction of metals with acid, a single replacement reaction, or to demonstrate the generation of hydrogen gas.
balanced chemical equation for:-
Sulphur + Nitric Acid => Sulphuric Acid + Nitrogen dioxide + Water.
ammonia reacts with chlorine and produce nitrogen gas and hydrogen chloride vapor. Produced hydrogen chloride vapor can behave as an acidic compound (can release H+ ions in the water). Then, hydrogen chloride reacts with basic ammonia gas to produce ammonium chloride which is a solid white smog.
Na
2
S
2
O
3
+2HCl⟶2NaCl+H
2
O+SO
2
+S
No. of Atom
No. of Atom
Na
2
2
C
2
2
O
3
3
H
2
2
Cl
2
2