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Standard 4.0 Chemistry

Topic D. Physical and Chemical Changes

Indicator 1. Cite evidence to support the fact that some substances can be separated into the original substances from which they were made.

Objective b. Based on data gathered, identify and describe various processes used to separate mixtures.

Selected Response Item

Mixtures may be separated into individual substances in a variety of ways. The graduated cylinder on Day One contains a mixture of salt and water. The graduated cylinder is left undisturbed for two days.

Question Image

By Day Three, a solid has formed at the bottom of the graduated cylinder. The solid is a single substance.

What process was used to separate the mixture?

  1. sifting
  2. filtration
  3. evaporation
  4. paper chromatography
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Correct Answer:
C