Study the scheme below and answer the questions that follow.

Study the scheme below and answer the questions that follow.


(i) What name is given to the type of cleansing agent prepared by the method above?
(ii) Name one chemical substance added in step II
(iii) What is the purpose of adding the chemical substance named in a (ii) above?
(iv) Name any other suitable substance that can be used in step I
(v) Explain how an aqueous solution of the cleansing agent removes oil during washing

Answers

(i) Soap.

(ii) Concentrated NaCl/ Brine/ NaCl_(l)

(iii) To precipitate out the soap

(iv) potassium hydroxide/ KOH_(aq)

(v) - Cleansing agent is made up of non- polar (hydrocarbon) and polar (head)
- When mixed with oil /grease, the hydrocarbon part is attracted to it while the polar part stays in water
- The oil particles are broken and carried off to the solution.

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maurice.mutuku answered the question on September 10, 2019 at 05:53

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