Multiple Choice
Which of the following can be broken down chemically into simpler substances?
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1. Intro to General Chemistry
Classification of Matter
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Which type of colloid best describes a pearl?
A
Solid sol
B
Gel
C
Solid foam
D
Solid emulsion
Verified step by step guidance1
Understand what a colloid is: a mixture where one substance is dispersed evenly throughout another, with particle sizes between those of a true solution and a suspension.
Identify the phases involved in the colloid types listed: a solid sol is solid particles dispersed in a liquid, a gel is a liquid dispersed in a solid, a solid foam is gas dispersed in a solid, and a solid emulsion is liquid droplets dispersed in a solid.
Consider the composition of a pearl: it is primarily a solid structure with liquid-like organic materials dispersed within the solid calcium carbonate matrix.
Match the pearl's structure to the colloid types: since it consists of liquid droplets dispersed in a solid matrix, it fits the definition of a solid emulsion.
Conclude that the best colloid type to describe a pearl is a solid emulsion, as it involves liquid dispersed in a solid.
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