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How to Separate Mixtures: A Guide to Physical Properties and Methods

This guide explores how to separate a mixture composed of sand, salt, iron filings, brass shavings, and Styrofoam. Each substance exhibits unique physical properties such as color, grain size, solubility in water, magnetism, and density. For instance, sand is gritty and insoluble, while salt dissolves easily. Iron filings are magnetic, unlike Styrofoam, which has a lower density. By analyzing these characteristics, we can determine effective separation methods, using physical changes like filtration and magnetism to isolate each component based on their unique attributes.

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How to Separate Mixtures: A Guide to Physical Properties and Methods

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  1. How can you separate a mixture? Physical Change

  2. Our mixture is made up of … • Sand • Salt • Iron Filings • Brass Shavings • Styrofoam

  3. List the physical characteristics of each substance. • Sand • Brownish color • Fine grained size • Will not dissolve in water • Gritty

  4. Sand • Not soluble in water • Not magnetic • Grains too large to fit through filter paper • Density is greater than 1 g/cm3

  5. Salt • Soluble in water • Not magnetic • Grains too large to fit through filter paper unless dissolved • Density is greater than 1 g/cm3

  6. Iron • Not soluble in water • Magnetic • Grains too large to fit through filter paper • Density is greater than 1 g/cm3

  7. Brass shavings • Not soluble in water • Not magnetic • Grains too large to fit through screen / sifter • Density is greater than 1 g/cm3

  8. Styrofoam • Not soluble in water • Not magnetic • Grains too large to fit through filter paper • Density is less than 1 g/cm3

  9. Will any of these physical characteristics that make it different (unique) from the other four substances?

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