Chemical Reactions

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What is a synthesis (or combination) reaction?

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A synthesis reaction is a type of chemical reaction where two or more reactants combine to form a single product. Example: 2H₂ + O₂ → 2H₂O.

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What are reactants in a chemical equation?

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Reactants are the substances that undergo a chemical change in a reaction, found on the left side of a chemical equation.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

What is the balanced equation for the reaction of zinc and hydrochloric acid?

Back

The balanced equation is: Zn + 2HCl → ZnCl₂ + H₂.

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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: 2H₂O → 2H₂ + O₂.

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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: AgNO₃ + NaCl → AgCl + NaNO₃.

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What is a combustion reaction?

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A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH₄ + 2O₂ → CO₂ + 2H₂O.

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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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What is the product in a chemical reaction?

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Products are the substances formed as a result of a chemical reaction, found on the right side of a chemical equation.

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What does it mean for a chemical equation to be balanced?

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A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, indicating that mass is conserved.