types of reactions

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes. Example: Using magnesium to displace hydrogen gas from water.

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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 reactants combine to form a single product. Example: NH₃ + HCl → NH₄Cl.

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What is a single displacement reaction?

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A single displacement reaction is a reaction where one element displaces another in a compound. Generalized equation: A + BC → AC + B.

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What is a decomposition reaction?

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A decomposition reaction is a reaction where a single compound breaks down into two or more simpler products. Generalized equation: AB → A + B.

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What is a double displacement reaction?

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A double displacement reaction is a reaction where two compounds exchange ions or bonds to form two new compounds. Generalized equation: AB + CD → AD + CB.

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What is the generalized equation for a synthesis reaction?

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The generalized equation for a synthesis reaction is A + B → AB.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

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What is an example of a physical change?

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Melting a stick of butter is an example of a physical change.

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What is the role of energy in chemical reactions?

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Energy is either absorbed or released during chemical reactions, influencing the reaction rate and the formation of products.

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What is an example of a double displacement reaction?

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An example of a double displacement reaction is: Na₂S + BaCl₂ → BaS + 2NaCl.