Mixtures Lab
Compare six everyday mixtures, decide if each is heterogeneous or homogeneous, and pick the right way to separate it. From salt water to oil and water to iron filings and sand, every example comes with a real-world tie-in.
Guided Experiment: Tell Heterogeneous from Homogeneous
What rule lets you decide if a mixture is heterogeneous (you can see the parts) or homogeneous (the parts blend evenly)?
Write your hypothesis in the Lab Report panel, then click Next.
Sand and water
You can see the different parts. Composition is not the same throughout.
Best Separation Methods
Pour the mixture through a filter that traps solid particles and lets liquid pass.
Let the heavier layer settle, then carefully pour off the lighter top layer.
Sand settles to the bottom. The water above looks cloudy at first, then clears.
Beach buckets and the bottom of a fish tank both show this kind of mixture.
Data Table
(0 rows)| # | Trial | Mixture | Components | Kind | Separation methods | Observation |
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Reference Guide
Heterogeneous vs Homogeneous
Heterogeneous mixtures show their parts. Sand in water, oil floating on water, and a bowl of cereal in milk all look like two or more things side by side.
Homogeneous mixtures (also called solutions) blend evenly. The parts mix at the particle level, so the mixture looks uniform. Salt water and clear tea are everyday examples.
Filtration and Decantation
Filtration catches solid particles with a screen or paper and lets the liquid pass through. It works when one part is solid and undissolved.
Decantation just pours off the lighter layer, leaving the heavier layer (or sediment) behind. Useful when components have very different densities, like oil on water.
Evaporation and Distillation
Evaporation drives off the liquid by heating. Whatever was dissolved (like salt) stays behind as a solid.
Distillation also heats, but the vapor is captured and cooled back to a liquid in another container. This recovers BOTH the dissolved solid and the pure liquid.
Magnet and Chromatography
A magnet pulls out iron, nickel, or cobalt from a mixture without touching anything else. This is how recycling centers sort steel from aluminum.
Chromatography uses a solvent moving through paper to separate inks and dyes. Different molecules travel different distances and form bands of color.
