Multiple Choice
Which of the following best describes pizza in terms of the classification of matter?
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1. Intro to General Chemistry
Classification of Matter
Multiple Choice
Which of the following best describes salad dressing in terms of the classification of matter?
A
Homogeneous mixture (solution)
B
Heterogeneous mixture (suspension)
C
Pure substance
D
Colloid
Verified step by step guidance1
Step 1: Understand the classification of matter into pure substances and mixtures. Pure substances have a uniform and definite composition, while mixtures contain two or more substances physically combined.
Step 2: Recognize that mixtures can be further classified as homogeneous or heterogeneous. Homogeneous mixtures (solutions) have a uniform composition throughout, while heterogeneous mixtures have visibly different parts or phases.
Step 3: Identify the types of heterogeneous mixtures: suspensions and colloids. Suspensions have larger particles that can settle out over time, while colloids have smaller particles that remain dispersed and do not settle.
Step 4: Consider the nature of salad dressing. Many salad dressings contain oil and vinegar, which do not mix uniformly and form separate layers or droplets, indicating visible differences in composition.
Step 5: Conclude that because salad dressing shows distinct phases and particles that can separate, it is best classified as a heterogeneous mixture, specifically a suspension.
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