Question

1. summarize the types of reactions by selecting a description of each reaction to match the reaction type.

combination
decomposition
single replacement
double replacement
combustion
a single element replaces a similar element in a compound.
two simple substances, often elements, react to form a single compound.
a substance reacts with oxygen.
a single compound reacts to form two or more simpler substances.
the two cations in two ionic compounds trade places.

Explanation:

• Combination: A combination reaction is when two simple substances (often elements) combine to form a single compound. So the description "Two simple substances, often elements, react to form a single compound." matches Combination.
• Decomposition: A decomposition reaction is when a single compound breaks down into two or more simpler substances. So the description "A single compound reacts to form two or more simpler substances." matches Decomposition.
• Single Replacement: A single replacement reaction is when a single element replaces a similar element in a compound. So the description "A single element replaces a similar element in a compound." matches Single Replacement.
• Double Replacement: A double replacement reaction is when the two cations (or anions) in two ionic compounds trade places. So the description "The two cations in two ionic compounds trade places." matches Double Replacement.
• Combustion: A combustion reaction is when a substance reacts with oxygen (usually producing heat and light). So the description "A substance reacts with oxygen." matches Combustion.

Answer:

• Combination: Two simple substances, often elements, react to form a single compound.
• Decomposition: A single compound reacts to form two or more simpler substances.
• Single Replacement: A single element replaces a similar element in a compound.
• Double Replacement: The two cations in two ionic compounds trade places.
• Combustion: A substance reacts with oxygen.