Page 2 - 3. LESSON NOTES- (DISPLACEMENT&DOUBLE DISPLACEMENT REACTION)

Blue sol. Pale green sol.

Observations-
a. Blue colour of solution changes to pale green due to the formation of FeSO4.
b. Reddish brown Cu gets deposited on the iron nails.

2. Reaction of copper coin with silver nitrate solution-

Cu + 2AgNO3 --> 2Ag(s) + Cu(NO3)2 [Cu>Ag]
colourless sol blue sol.
Observations-
a. Colour less solution turns blue due to the formation of Cu(NO3)2.
b. Silver gets deposited on the Cu coin.

3. Reaction of calcium with water solution-

Ca + 2H2O -> Ca(OH)2 + H2(g) [Ca>H]

4. Reaction of zinc granules with hydrochloric acid solution-

Zn + 2HCl -> ZnCl2 + H2(g) [Zn>H]

Observation for Ex. 3 & 4-
a. Fizzing occurs due to the liberation of Hydrogen, which burns with a pop
sound when a lighted match stick is brought near the delivery tube.
b. The conical flask turns warm as it’s an exothermic reaction.

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