Question 43
Fats, Oils and SoapsThe leachate of a certain plant ash is used in local soap-making because it contains.
- A.sodium chloride and potassium hydroxide
- B.sodium hydroxide
- C.potassium hydroxide
- D.soluble carbonates and hydrogen carbonates.
Show the answer and explanation
Answer: D (soluble carbonates and hydrogen carbonates.)
Explanation
Water run through plant ash dissolves mainly potassium carbonate (potash) and hydrogen carbonates; this alkaline solution saponifies the oil.