Chemical Reactions

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What is a chemical reaction?
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A process where one or more substances change into different substances.
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What are the reactants in a chemical reaction?
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The starting substances that react with each other in a chemical reaction.
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What is a product in a chemical reaction?
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The substance(s) formed as a result of a chemical reaction.
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What is a synthesis reaction?
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When two or more substances combine to form a single new substance.
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Give an example of a decomposition reaction.
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Water breaking down into hydrogen and oxygen (H2O = H2 + O2).
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What is a single displacement reaction?
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When a more reactive element replaces a less reactive element in a compound.
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What is the reactivity series used for?
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To predict how substances will react based on their reactivity.
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How does a double displacement reaction occur?
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Two compounds exchange ions or bonds to form different compounds.
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What is the formula for magnesium oxide formation?
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2 Mg + O2 → 2 MgO
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What is an example of a product from a chemical reaction?
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MgO (magnesium oxide) from reacting Mg and O2.
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Define oxidation in terms of electrons.
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The loss of electrons during a chemical reaction.
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What is reduction?
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The gain of electrons during a chemical reaction.
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What is meant by a balanced chemical equation?
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An equation in which the number of atoms for each element is equal on both sides of the equation.
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What are the law of conservation of mass implications in reactions?
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Mass is neither created nor destroyed in a chemical reaction.
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What is a catalyst?
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A substance that speeds up a chemical reaction without being consumed.
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