A mixture of water and starch is colloidal because it forms a shell of firmly bound molecules of water that stops the starch particles from aggregating with the molecules of water when they collide. However, when heated,... More »

Suspension is when particles of solid material are held within a fluid. The particles are large enough to not dissolve in the fluid, and they separate easily when disturbed. Particles may settle to the bottom of the cont... More »

Suspensions are mixtures of two different substances, one of which consists of small particles that eventually settle down as sediments. These particles are usually larger than one micrometer. Suspensions are found in na... More »

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The main difference between a colloid and a suspension is that a suspension will separate into particles, but a colloid will not. A colloid is the middle line between a suspension and a solution. More »

Gelatin, when dissolved in water, is a colloid because the protein molecules that compose it, mostly derived from collagen, are much larger than usual dissolved molecules, but they remain evenly dispersed throughout the ... More »

A suspension is a heterogeneous mixture that has particles held in a liquid or gas that are not dissolved, such as sand in water, oil in water and smoke in air. The key characteristic that differentiates a suspension mix... More »

Iodine stains starch because of the chemical reaction between it and the polysaccharides in starch molecules. This reaction turns the starch a deep blue hue. This phenomenon is called Lugol's reaction for starch. Iodine ... More »