Pure Substances and Mixtures

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What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It cannot be separated into simpler substances by physical means.

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What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can be separated by physical methods.

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What is filtration?

Back

Filtration is a technique used to separate solids from liquids or gases by passing the mixture through a filter, which allows the liquid or gas to pass while retaining the solid.

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What is the difference between a homogeneous mixture and a heterogeneous mixture?

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A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct, separate components.

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Can the properties of a compound be the same as its elements?

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No, the properties of a compound are different from those of its constituent elements.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is sugar dissolved in water, where the composition is uniform throughout.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where the individual components can be seen and separated.

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What is crystallization?

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Crystallization is a process used to separate a solid from a solution by forming solid crystals from the dissolved substance.

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What is distillation?

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Distillation is a separation technique that involves heating a liquid to create vapor and then cooling the vapor to create a liquid, effectively separating components based on their boiling points.

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Can a pure substance be broken down into simpler substances using physical methods?

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No, a pure substance cannot be broken down into simpler substances using physical methods.