Types of chemical equations

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What is a compound?

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A compound is a substance formed when two or more elements chemically bond together in fixed proportions. Example: Sodium chloride (NaCl) is a compound made of sodium and chlorine.

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What type of reaction is represented by HCl + NaOH ↔ H2O + NaCl?

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This is a double replacement reaction, where the anions and cations of two different compounds exchange places to form two new compounds.

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What type of reaction is represented by 2H2O2 → 2H2O + O2?

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This is a decomposition reaction, where a single compound breaks down into two or more simpler products.

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How do you balance the equation KCl + O2 → KClO3?

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The balanced equation is 2 KCl + 3 O2 → 2 KClO3.

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What type of reaction is represented by CH4 + 2O2 → CO2 + 2H2O?

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This is a combustion reaction, where a hydrocarbon reacts with oxygen to produce carbon dioxide and 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 simple substances combine to form a more complex product. Example: 2H2 + O2 → 2H2O.

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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 substances. Example: 2H2O → 2H2 + O2.

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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: Zn + 2HCl → ZnCl2 + H2.

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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 the anions and cations of two different compounds exchange places to form two new compounds. Example: AgNO3 + NaCl → AgCl + NaNO3.

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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.