Reading Comprehension: Main Idea Questions

The author is chiefly concerned with which of the following?

Well done!

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The first paragraph defines saturated solutions (which are at equilibrium). The second paragraph defines supersaturated solutions (which have more dissolved solute than a solution at equilibrium). The third and fourth paragraphs discuss the effects of both these types of solutions on crystallization, a chemical phenomenon.

Incorrect.

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This answer choice is too narrow. Examples of the effects of saturation and supersaturation are discussed only in the third and fourth paragraphs.

Incorrect.

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This answer choice is too broad. The passage focuses on the implications of the amount of solute on two specific kinds of solutions (saturated and supersaturated) not solutions in general.

Incorrect.

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The first paragraph briefly mentions that other disciplines use the term saturation, but no other paragraph describes or refers to another usage of this term.

Incorrect.

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Although the passage focuses on the definitions of saturation and supersaturation, it does not compare the two states.

describing solutions that contain the exact amount or more than the exact amount of solute required to reach equilibrium and their effects on another chemical phenomenon

exemplifying the effects of saturation and supersaturation on certain phenomena

showing the implications of the amount of solute dissolved within a solution

illustrating how chemistry defines the concept of saturation and comparing that definition to other disciplines' definitions of saturation

defining saturation and supersaturation and explaining the differences between the two states