Heterogeneous Mixture Chemistry Example 2

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Example 2

medium
Classify the following as homogeneous or heterogeneous and justify: (a) Italian salad dressing (oil and vinegar layers), (b) milk under a microscope (tiny fat droplets in water), (c) filtered apple juice.

Solution

  1. 1
    (a) Italian dressing: heterogeneous ā€” two visible layers (oil on top, vinegar on bottom) with different compositions.
  2. 2
    (b) Milk: heterogeneous ā€” although it appears uniform to the naked eye, under a microscope fat globules are visible as distinct droplets suspended in water (it is a colloid/emulsion).
  3. 3
    (c) Filtered apple juice: homogeneous ā€” after filtering, the dissolved sugars, acids, and flavors are uniformly distributed with no visible particles.

Answer

(a)Ā heterogeneous,Ā (b)Ā heterogeneousĀ (colloid),Ā (c)Ā homogeneous\text{(a) heterogeneous, (b) heterogeneous (colloid), (c) homogeneous}
Classification can depend on the scale of observation. Milk appears homogeneous to the eye but is revealed as heterogeneous under magnification. Colloids are a special class of mixtures that blur the boundary between homogeneous and heterogeneous.

About Heterogeneous Mixture

A mixture in which the composition is not uniform throughout, with visibly or microscopically distinct regions that have different compositions and properties.

Learn more about Heterogeneous Mixture ā†’

More Heterogeneous Mixture Examples

Example 1 easy

Define a heterogeneous mixture and explain how to recognize one. Provide three examples.

Example 3 medium

Explain why oil and water form a heterogeneous mixture rather than a homogeneous one, using the conc

Example 4 hard

Blood is often described as a heterogeneous mixture. Identify at least three distinct components of

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