6. Why does the colour of copper sulphate solution change when an iron nail is dipped in it. Write the chemical equation of the reaction involved
Answers
Answer:
When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
Reaction
CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
In this reaction following two processes take place:
Cu²⁺ + 2e = Cu⁰ (reduction process, Cu²⁺ is the oxidizing agent)
Fe⁰ – 2e = Fe²⁺ (oxidation process, Fe⁰ is the reducing agent)
The reaction can be double displacement reaction as well as redox reaction (oxidation and reduction both takes place simultaneously).
Explanation:
hope it helps
CaCO
3
→
heat
CaO+CO
2
NH
3
+H
2
O→NH
4
+
+OH
−
Na
+
+Cl
−
+NH
4
+
+OH
−
+CO
2
→Na
+
+HCO
C
−
+NH
4
+
+Cl
−
Na
+
+HCO
3
→NaHCO
3
(as precipitate)
NH
4
+
+Cl
−
→NH
4
Cl (in solution)
2NaHCO
3
→
heat
Na
2
CO
3
+H
2
O+CO
2
2NaCO
3
+10H
2
O→Na
2
CO
3
.10H
2
O