Types of Chemical Reactions

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What is a composition (synthesis) reaction?

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A composition (synthesis) reaction is a type of chemical reaction where two or more reactants combine to form a single product. For example, Si(s) + 2Cl2(g) → SiCl4(l).

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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 ionic compounds exchange ions to form two new compounds. The general form is AB(aq) + CD(aq) → AD + BC.

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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. For example, AB → A + B.

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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 reacts with oxygen, producing energy in the form of heat and light. Commonly involves hydrocarbons reacting with oxygen to produce carbon dioxide and water.

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What is a catalyst?

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A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It lowers the activation energy required for the reaction.

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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 (bubbles), formation of a precipitate, and change in odor.

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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 an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to the surroundings.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs energy from the surroundings, resulting in a decrease in temperature.

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What is the role of reactants in a chemical reaction?

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Reactants are the starting substances in a chemical reaction that undergo change to form products.