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Chemical For Consumer: Essay

This experiment aims to compare the cleansing power of soap and detergent in hard water. Fabric stained with grease is added to beakers containing hard water and either soap or detergent. The fabric is stirred in each solution and then observed. The results show that greasy spots remain on the fabric cleaned with soap in hard water, while greasy spots are removed from the fabric cleaned with detergent in hard water, supporting the hypothesis that detergent cleansing power is unaffected by hard water unlike soap.

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34 views2 pages

Chemical For Consumer: Essay

This experiment aims to compare the cleansing power of soap and detergent in hard water. Fabric stained with grease is added to beakers containing hard water and either soap or detergent. The fabric is stirred in each solution and then observed. The results show that greasy spots remain on the fabric cleaned with soap in hard water, while greasy spots are removed from the fabric cleaned with detergent in hard water, supporting the hypothesis that detergent cleansing power is unaffected by hard water unlike soap.

Uploaded by

baskie
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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CHEMICAL FOR CONSUMER

ESSAY
Cleansing power of soap is lower in hard water whereas the cleansing power of detergent
is unaffected in hard water. Describe an experiment to prove the above statement.
(a) Problem statement: Is the cleansing power of detergent unaffected in hard water?
(b) Hypothesis: Cleansing power of soap is lower in hard water whereas the cleansing power
of detergent is unaffected in hard water.
(c) Variables :
Manipulated : Addition of soap and detergent. Responding : Whether grease is removed
from fabric. Controlled : Mass of soap and detergent added.
(d) Apparatus : Two 500 ml beakers, glass rod, fabric stained with grease, weighing balance,
measuring cylinder.
Chemicals : 5 gram of soap and 5 gram of detergent powder, common salt, distilled water.
(e) Procedure :
1. Two portions of 400 ml of distilled water was poured into two beakers labeled A and B.
2. Two spatulas of common salt was added into each beaker and stirred until it dissolved.
3. 5 gram of soap was added into beaker A and 5 gram of detergent powder was added
into beaker B.
4. Two pieces of fabric stained with grease was dropped into each beaker and the mixture
was stirred with a glass rod for 30 minutes.
5. The fabric was removed and the observation recorded.
(f) Tabulation:
Beaker A B
Observatio Greasy spots Greasy spots
n remain on fabric. removed from
fabric.

Sample answer
To compare the effectiveness of the cleansing action of soap and detergent in
hard water.

Manipulated variable: Soap and detergent


Responding variable: Effectiveness of cleansing action // the ability to remove the oily stains on
cloth
Fixed variable: cloth with oily stains, hard water

The cleansing action of a detergent is more effective in hard water than a soap

Apparatus : 2 beakers, , glass rod


Materials : Hard water, soap and detergent solution, 2 pieces of clothes stained
with oil

1. [50 - 200] cm3 of hard water is poured into abeaker


2. Soap is added into thebeakers
3. A piece of cloth stained with oil is immersed in the solution.
4. The cloth is shaken/rubbed
5. Observation is recorded.
Repeat steps 1-6 by using detergent

Types of cleaning agent Observation

Soap
Detergent

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