After you have dinner tonight, wash your own plates with soap/detergent.
- What colour change is observed when soap/detergent is applied?
- Name the type of reaction and explain it.
(a) When we wash our dinner plate with soap/detergent, the yellow oily leftover stains will turn red/orange due to its reaction with soap/detergent.
(b) It is a neutralisation reaction. The reaction between an acid and a base to form salt and water is called a neutralisation reaction.