Mixture Chemistry Example 4
Follow the full solution, then compare it with the other examples linked below.
Example 4
hardSeawater contains dissolved salts (), dissolved gases, and suspended particles. Classify seawater as a type of mixture and outline a procedure using at least three separation techniques to isolate the dissolved salt, fresh water, and suspended particles.
Solution
- 1 Seawater is primarily a homogeneous mixture (solution) with some heterogeneous components (suspended particles).
- 2 Step 1 — Filtration: removes suspended particles (sand, plankton) based on particle size. Step 2 — Distillation: heat the filtered water to boil off and collect pure water as the distillate. Step 3 — Evaporation: allow the remaining concentrated salt solution to evaporate completely, leaving behind solid salt crystals.
- 3 Each technique exploits different physical properties: particle size (filtration), boiling point (distillation), and state change (evaporation).
Answer
Desalination of seawater is a real-world application of mixture separation techniques. Modern desalination plants use reverse osmosis (membrane separation) as a more energy-efficient alternative to distillation.
About Mixture
A physical combination of two or more substances that are not chemically bonded, retain their individual properties, exist in variable proportions, and can be separated.
Learn more about Mixture →More Mixture Examples
Example 1 easy
Define a mixture and explain how it differs from a pure substance. Give two examples.
Example 2 mediumA student has a clear, colorless liquid. Describe two experimental tests to determine whether it is
Example 3 mediumExplain why mixing iron filings and sulfur powder produces a mixture, but heating them together prod