Question 1

A mixture where one substance in a finely divided state is dispersed throughout another is known as a ____.

Accepted Answer

A colloidal suspension is a mixture where one substance is dispersed in another, with the dispersed particles being small enough to remain suspended.

Question 2

Which of these properties of soap provide it the ability to dissolve grease in water?

Accepted Answer

Soap molecules have a polar (hydrophilic) head and a nonpolar (hydrophobic) tail, allowing them to interact with both water and grease, effectively dissolving grease in water.

Question 3

Soap functions in the dissolution of grease when its ____ interacts with the nonpolar grease while its ____ interacts with water.

Accepted Answer

The hydrocarbon tail of soap interacts with the nonpolar grease, while the ionic head interacts with water, allowing the grease to be emulsified and washed away.

Question 4

Soap is classified as a(n):

Accepted Answer

Soap is classified as a surfactant because it reduces the surface tension of water, allowing it to mix with oils and dirt for cleaning purposes.

Question 5

Which of these ions found in hard water will reduce the effectiveness of soap?

Accepted Answer

Calcium ions (Ca²⁺) in hard water react with soap to form insoluble salts, reducing soap's effectiveness.

Question 6

Which of these substances will stain fabric but can be removed because it dissolves easily in water?

Accepted Answer

Syrup is water-soluble, so it can be removed from fabric by washing with water.

Question 7

Which of these substances is used to oxidize tough stains on fabrics?

Accepted Answer

Bleach is commonly used to oxidize and break down tough stains on fabrics, making them easier to remove.

Question 8

Which of these substances becomes trapped in the center of the micelle when it is formed?

Accepted Answer

Grease is the substance that becomes trapped in the center of the micelle when it is formed.

Question 9

Which of these represent(s)characteristic(s)of LAS detergents but not of ABS detergents?
I. Biodegradable
II. Branched alkyl chain
III. Anionic detergent

Accepted Answer

The answer of Which of these represent(s)characteristic(s)of LAS detergents but...

Question 10

Which of these is\are characteristic(s)of soap?
I. It acts at surfaces.
II. It contains a polar ionic head.
III. Micelles of soap are neutral and therefore react with grease effectively.

Accepted Answer

Soap acts at surfaces and contains a polar ionic head, which helps it interact with water and grease. However, micelles are not neutral; they have a charged surface that helps emulsify grease.

Question 11

A group of soap molecules will form a micelle to minimize which of these?

Accepted Answer

Micelles form to minimize the exposure of the hydrophobic hydrocarbon tails of soap molecules to water, while the hydrophilic ionic heads remain in contact with the water.

Question 12

Soap molecules can cluster together and form structures called:

Accepted Answer

Soap molecules can cluster together to form micelles, which are spherical structures that help trap and remove dirt and oil.

Question 13

Which of these was the primary problem with alkylbenzenesufonates (ABS)detergents?

Accepted Answer

Alkylbenzenesulfonates (ABS) detergents were primarily problematic because they were nonbiodegradable, leading to environmental pollution as they accumulated in water bodies.

Question 14

Which of these represent(s)characteristic(s)of ABS detergents?
I. Biodegradable
II. Branched alkyl chain
III. Cationic detergent

Accepted Answer

The answer of Which of these represent(s)characteristic(s)of ABS detergents?
I. Biodegradable
II....

Question 15

Which of these is not a problem associated with soap in hard water?

Accepted Answer

Soap in hard water forms curd and is less effective, but it is not nonbiodegradable or inherently expensive.

Question 16

Which of these is\are not characteristic(s)of soap?
I. It acts at surfaces.
II. It contains a polar hydrocarbon tail.
III. An abundance of soap added to water results in micelles.

Accepted Answer

Soap contains a polar head and a non-polar hydrocarbon tail, not a polar hydrocarbon tail.

Question 17

Which of these detergents was the first developed in response to the problems associated with ABS detergents?

Accepted Answer

LAS (Linear Alkylbenzene Sulfonate) detergents were developed as a response to the environmental problems caused by ABS (Alkylbenzene Sulfonate) detergents, which were not biodegradable. LAS detergents are more environmentally friendly and biodegradable.

Question 18

Which of these substances acts as the emulsifying agent in a mixture of soap, water, and grease?

Accepted Answer

Soap acts as the emulsifying agent by allowing water and grease to mix, forming an emulsion.

Question 19

Which of these was the first synthetic detergent designed to combat the problem of hard water?

Accepted Answer

ABS (Alkylbenzene sulfonate) was the first synthetic detergent developed to address the issue of hard water.

Question 20

Which of these is another name for colloidal suspensions?

Accepted Answer

Colloidal suspensions are also known as emulsions, which are mixtures where one substance is dispersed in another.

Quiz 15: The Chemistry of Household Products

A mixture where one substance in a finely divided state is dispersed throughout another is known as a ____.

Which of these properties of soap provide it the ability to dissolve grease in water?

Soap functions in the dissolution of grease when its interacts with the nonpolar grease while its interacts with water.

Soap is classified as a(n) :

Which of these ions found in hard water will reduce the effectiveness of soap?

Which of these substances will stain fabric but can be removed because it dissolves easily in water?

Which of these substances is used to oxidize tough stains on fabrics?

Which of these substances becomes trapped in the center of the micelle when it is formed?

Which of these represent(s) characteristic(s) of LAS detergents but not of ABS detergents? I. Biodegradable II. Branched alkyl chain III. Anionic detergent

Which of these is\are characteristic(s) of soap? I. It acts at surfaces. II. It contains a polar ionic head. III. Micelles of soap are neutral and therefore react with grease effectively.