Rusting 🧪

Question 1

What is required for the rusting of iron?

Answer 1

H2O and O2 (air)

Question 2

What is the colour of rust?

Answer 2

Red-brown (brown)

Question 3

What kind of process is rusting

Answer 3

Slow oxidation process

Question 4

How to remove/ prevent rust?

Answer 4

Apply oil or grease (lubricant)
Painting
Cover with plastic
Electro plate with another metal (Cromium)

Question 5

What acts as a catalyst for rusting?

Answer 5

Salt water

Question 6

What liquid creates slow rusting and why?

Answer 6

Oil, no water present

Question 7

What acts as a drying agent?

Answer 7

CaCl2
SiO2

Question 8

Why does rusting happen slower in boiled water?

Answer 8

Less O2

Question 9

How to prove 1/5 of air is O2?

Answer 9

Place iron wool at the top of a glass jar placed inside a trough containing H2O

When the rusting of iron wool occurs is will use up all the oxygen.

Pressure inside the jar decreases and the atmospheric pressure will push water into the jar by 1/5.