Unit 6: Properties of Matter in Aqueous Solutions - 7th Sci

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties. Example: Burning wood.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: Melting ice.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout. Example: Saltwater.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. Example: Salad.

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What happens during dilution?

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Dilution is the process of reducing the concentration of a solute in a solution, usually by adding more solvent. Example: Adding water to saltwater.

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What is a solution?

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A solution is a homogeneous mixture composed of two or more substances, where one substance (the solute) is dissolved in another (the solvent).

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What is the solute in a solution?

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The solute is the substance that is dissolved in a solution. Example: Salt in saltwater.

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What is the solvent in a solution?

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The solvent is the substance that dissolves the solute in a solution. Example: Water in saltwater.

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What is concentration?

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Concentration is the amount of solute present in a given volume of solution. It can be expressed in various units, such as molarity.

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What is the difference between physical and chemical changes?

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Physical changes do not alter the chemical composition of a substance, while chemical changes result in the formation of new substances.