Experiment 10 — Which Metal Wins?

Topic: Chemistry · Class 8 · Displacement reactions and the reactivity series

Aim: Get a reddish-brown copper coating on the metal strip.

Daily: This reaction is used to extract metals from their compounds, and it explains why a steel spoon left in a copper vessel can pick up a copper tinge.

Question: A silver wire is dipped into copper sulphate solution. What happens?

Exp: Only a metal more reactive than copper can displace it.

Question: An iron nail in copper sulphate solution turns…

Exp: Iron displaces copper from the solution.

Question: The blue colour fades because…

Exp: The copper is deposited on the more reactive metal.

Question: Which metal is the least reactive?

Exp: Which is why gold is found pure and does not tarnish.

Question: Sodium is never found free in nature because it is…

Exp: It reacts readily, so it occurs only in compounds.