Heterogeneous Mixture Chemistry Example 4

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Example 4

hard
Blood is often described as a heterogeneous mixture. Identify at least three distinct components of blood and explain why centrifugation can separate them.

Solution

  1. 1
    Blood contains: plasma (liquid, ~55%), red blood cells (~44%), white blood cells, and platelets (~1%). These are physically distinct components.
  2. 2
    Centrifugation spins the blood at high speed, creating a strong centripetal force that separates components by density — denser red blood cells settle to the bottom, lighter plasma remains on top.
  3. 3
    This physical separation confirms blood is a heterogeneous mixture, not a pure substance or homogeneous solution.

Answer

Blood: plasma, RBCs, WBCs, platelets — separated by centrifugation (density).\text{Blood: plasma, RBCs, WBCs, platelets — separated by centrifugation (density).}
Blood is a complex heterogeneous mixture that appears uniform to the naked eye but contains distinct cellular components suspended in plasma. Centrifugation exploits density differences to achieve rapid separation.

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.

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