Chemical Reactions

Front

What are properties of a substance?

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Properties are characteristics that define a substance, such as color, state, and density.

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What is a chemical equation?

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A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

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.

Front

What is a chemical change?

Back

A chemical change involves a transformation that alters the chemical composition of a substance, resulting in new substances.

Front

What is the role of water in photosynthesis?

Back

Water (H2O) provides hydrogen atoms necessary for the production of glucose (C6H12O6) during photosynthesis.

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What is the difference between reactants and products?

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Reactants are substances that undergo a chemical change, while products are the new substances formed as a result of the reaction.

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What is an example of a physical change?

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Dissolving sugar in water is an example of a physical change.

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What is an example of a chemical change?

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Burning wood is an example of a chemical change, as it produces ash and gases.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.