Identify the type of reaction below:Mg + 2 HCl --> MgCl2 + H2Group of answer choicesCombinationSingle displacementDecompositionDouble displacement

Step 1: Break Down the Problem

We need to identify the type of chemical reaction represented by the equation: $\text{Mg} + 2 \text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2$

Step 2: Relevant Concepts

The types of chemical reactions include:

1. Combination Reaction: Two or more substances combine to form a single compound.
2. Single Displacement Reaction: One element displaces another in a compound.
3. Decomposition Reaction: A single compound breaks down into two or more simpler products.
4. Double Displacement Reaction: The ions of two compounds exchange places in an aqueous solution to form two new compounds.

Step 3: Analysis and Detail

In the given reaction:

• Magnesium (Mg) is a solid metal.
• Hydrochloric acid (HCl) is an acid that dissociates into H⁺ and Cl⁻ ions.
• Magnesium displaces hydrogen (H) from hydrochloric acid, leading to the formation of magnesium chloride (MgCl₂) and hydrogen gas (H₂).
• The products formed consist of one compound (MgCl₂) and a gas (H₂).

Step 4: Verify and Summarize

Since magnesium displaces hydrogen from HCl, this reaction fits the definition of a single displacement reaction. No new compounds are formed by replacing the partners in a double displacement manner.

Final Answer

The type of reaction is Single displacement.