Experiment 7 — Electroplating a Spoon

Topic: Physics / Chemistry · Class 8 · Chemical effects of electric current

Aim: Coat the steel spoon with a smooth, even layer of copper .

Daily: Ornaments are gold-plated, cycle handlebars and taps are chromium-plated to resist rust, and food cans are tin-plated inside so the steel never touches the food.

Question: Which liquid will conduct electricity?

Exp: It contains free ions; sugar solution and distilled water do not.

Question: In electroplating, the object to be plated is connected to the…

Exp: Positive metal ions travel to the negative electrode.

Question: The copper anode is used because it…

Exp: It keeps the solution’s strength steady.

Question: Chromium plating on taps is done mainly to…

Exp: Chromium resists rust and polishes well.

Question: Distilled water does not conduct because it has no…

Exp: Ions are needed to carry charge through a liquid.