4.4 PRECIPITATION REACTIONS

Question 1

What are the types of chemical reaction and what happens in it?

Answer 1

1. Combustion
   - (Metal) + Oxygen -> Metal oxide
2. Reaction with acid
   - (Metal) + Acid -> (Salt) + hydrogen
3. Precipitation
   - Two reactants in solution react to make a precipitate

Question 2

What is precipitate?

Answer 2

Suspension of tiny solid particles in a liquid or solution

Question 3

What is the use of precipitation reaction?

Answer 3

Sodium hydroxide are used to identify substances