Multiple Choice
Which of the following best describes the characteristics of a mixture?
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1. Intro to General Chemistry
Classification of Matter
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Which of the following mixtures is homogeneous?
A
Oil and water
B
Salt water
C
Sand and iron filings
D
Granite
Verified step by step guidance1
Understand the definition of a homogeneous mixture: it is a mixture that has a uniform composition and appearance throughout, meaning you cannot distinguish the different components with the naked eye.
Analyze each option to determine if the components are evenly distributed: for example, oil and water separate into layers because they are immiscible, so this mixture is heterogeneous.
Consider salt water: when salt dissolves in water, it forms a solution where the salt ions are evenly dispersed at the molecular level, making it a homogeneous mixture.
Look at sand and iron filings: these are two distinct solid substances that do not dissolve into each other and can be physically separated, so this mixture is heterogeneous.
Examine granite: it is a solid rock composed of different minerals visibly mixed together, so it is a heterogeneous mixture.
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