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Difficulty: EasyChemical Reactions and Compounds

In physical science, chemical reactions are categorized by how reactant atoms and compounds interact to form products. Match each described chemical reaction scenario on the left with its correct reaction classification on the right.

  • Burning propane fuel in the presence of oxygen to yield carbon dioxide and waterCombustion
  • Splitting liquid water into hydrogen gas and oxygen gas using an electric currentDecomposition
  • Combining solid magnesium metal and oxygen gas to produce magnesium oxide powderSynthesis
  • Mixing hydrochloric acid with sodium hydroxide to yield table salt and waterNeutralization

Answer

Burning propane in oxygen matches Combustion; Splitting water into hydrogen and oxygen matches Decomposition; Combining magnesium and oxygen into magnesium oxide matches Synthesis; Mixing hydrochloric acid and sodium hydroxide matches Neutralization.
Each process demonstrates a core category of chemical change: burning propane with oxygen to produce carbon dioxide and water is combustion; splitting water into hydrogen and oxygen gas via electricity is decomposition; combining magnesium and oxygen into a single compound is synthesis; and mixing hydrochloric acid with sodium hydroxide to create salt and water is neutralization.

Step-by-Step Solution

1
Identify the reaction where a fuel rapidly reacts with oxygen gas (O2O_2) producing energy, carbon dioxide (CO2CO_2), and water (H2OH_2O).
Burning propane corresponds to a Combustion reaction (C3H8+5O2→3CO2+4H2OC_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O).
Combustion occurs when a substance combines with oxygen rapidly, releasing heat and light.
2
Identify the process where a single reactant compound breaks down into two or more distinct products.
Splitting water into hydrogen and oxygen corresponds to a Decomposition reaction (2H2O→2H2+O22H_2O \rightarrow 2H_2 + O_2).
Decomposition represents the breakdown of a single substance into simpler parts.
3
Identify the process where two or more individual reactants join together to create a single compound.
Combining magnesium and oxygen into magnesium oxide corresponds to a Synthesis reaction (2Mg+O2→2MgO2Mg + O_2 \rightarrow 2MgO).
Synthesis involves building up a larger or more complex molecule from simpler elements or compounds.
4
Identify the reaction where an acidic solution and a basic solution react to yield a neutral salt and water.
Mixing hydrochloric acid and sodium hydroxide corresponds to a Neutralization reaction (HCl+NaOH→NaCl+H2OHCl + NaOH \rightarrow NaCl + H_2O).
Neutralization is an acid-base double displacement reaction where hydrogen and hydroxide ions combine to form water.

Key Concept

Classifying Fundamental Chemical Reactions
Estimated Time:45s
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Topics

Chemical Reactions and Compounds

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