Question

a) Rishika wants to deposit silver on iron spoon. She took an iron spoon, a silver block, a bottle of silver nitrate solution and another bottle of iron sulphate solution.
i) To setup a simple circuit of electroplating which solution should she use as an electrolyte?
ii) Which terminal of battery should the spoon be connected to?
b) Which of the following liquids conduct electricity?
Common salt solution, Sugar Solution, Distilled water, Lemon juice, Milk, Rain water
c) State two uses of electroplating

Answer 1

Dear student,
A

i) Silver nitrate is used as solution. When electric current is passed, silver nitrate breaks into silver and nitrate ions and as a result silver ions gets attracted to negative plate and deposit on iron rod.
ii) Since the material is to be electroplated is iron spoon, it should be connected to negative terminal of the battery. Positive terminal should be made of silver.

b) Lemon juice, Milk, Vinegar, common salt solution, Sulphuric acid solution, Seawater, and Rainwater conduct electricity. This is because dissociated ions can move freely in solution, allowing a charge to flow. Sugar solution, distilled water and honey do not conduct electricity as they

c) Uses of electroplating:
It is used in bicycle to resist rust or corrosion.

It is used in LPG stoves to resist rust.
Regards