Problem: Which diagram best represents a liquid–liquid emulsion such as milk? The colored balls represent different liquid molecules.

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An emulsion or colloid is a mixture of liquids that are normally immiscible (unmixable). This is usually caused by solutes that have complex structure which usually have very large structures that  cannot be dissolved and will appear as suspended in the mixture.

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(a) Red and blue balls appear randomly scattered and are close together. (b) Red balls are clumped in groups of three as are some blue balls in groups of two; some blue balls are single. (c) Red and blue balls are uniformly distributed, remaining ordered and close together within a liquid.

Which diagram best represents a liquid–liquid emulsion such as milk? The colored balls represent different liquid molecules.

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