Balancing Chemical Equations & Reaction Types - PHYSICAL SCIENCE

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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 along with their quantities.

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What does it mean to balance a chemical equation?

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Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation, adhering to the law of conservation of mass.

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: A + B → AB.

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What is a decomposition reaction?

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A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. Example: AB → A + B.

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What is a single replacement reaction?

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A single replacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: A + BC → AC + B.

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What is a double replacement reaction?

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A double replacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: AB + CD → AD + CB.

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What is a combustion reaction?

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A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: Hydrocarbon + O2 → CO2 + H2O.

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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; the total mass of reactants equals the total mass of products.

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How do you identify a combustion reaction?

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A combustion reaction can be identified by the presence of oxygen as a reactant and the production of carbon dioxide and water as products.

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What are the signs of a chemical reaction?

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Signs of a chemical reaction include color change, temperature change, gas production, and the formation of a precipitate.