A Voyage through Equations ter working on this worksheet. you should be able to do the following Given an equation, you should be able to tell what kind of reaction it is Predict the products of a reaction when given the reactants. Section 1: Identity the type of reaction For the following reactions, indicate whether the following are examples of synthesis decomposition, combustion, single displacement, double displacement or acid-base reactions
The Correct Answer and Explanation is :
Identifying Reaction Types: Explanation and Answers
Chemical reactions can be classified into different categories based on the rearrangement of atoms and the changes in reactants and products. These types include synthesis, decomposition, combustion, single displacement, double displacement, and acid-base reactions. Below are explanations and how to identify each type:
1. Synthesis Reaction
- Definition: Two or more reactants combine to form a single product.
- General Formula: ( A + B \rightarrow AB )
- Example:
[ 2H_2 + O_2 \rightarrow 2H_2O ]
This is a synthesis reaction as hydrogen and oxygen combine to form water.
2. Decomposition Reaction
- Definition: A single compound breaks down into two or more products.
- General Formula: ( AB \rightarrow A + B )
- Example:
[ 2HgO \rightarrow 2Hg + O_2 ]
Mercury(II) oxide decomposes into mercury and oxygen gas.
3. Combustion Reaction
- Definition: A hydrocarbon reacts with oxygen to produce carbon dioxide and water.
- General Formula: ( C_xH_y + O_2 \rightarrow CO_2 + H_2O )
- Example:
[ CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O ]
Methane combusts in oxygen to produce carbon dioxide and water.
4. Single Displacement Reaction
- Definition: One element displaces another in a compound.
- General Formula: ( A + BC \rightarrow AC + B )
- Example:
[ Zn + 2HCl \rightarrow ZnCl_2 + H_2 ]
Zinc displaces hydrogen from hydrochloric acid to form zinc chloride and hydrogen gas.
5. Double Displacement Reaction
- Definition: The ions of two compounds exchange places.
- General Formula: ( AB + CD \rightarrow AD + CB )
- Example:
[ NaCl + AgNO_3 \rightarrow NaNO_3 + AgCl ]
Sodium chloride and silver nitrate exchange ions to form sodium nitrate and silver chloride.
6. Acid-Base Reaction
- Definition: An acid reacts with a base to form water and a salt.
- General Formula: ( HA + BOH \rightarrow BA + H_2O )
- Example:
[ HCl + NaOH \rightarrow NaCl + H_2O ]
Hydrochloric acid reacts with sodium hydroxide to produce sodium chloride and water.
Summary Table with Types of Reactions:
For the worksheet:
- Identify the reactants and products.
- Match the reaction pattern to the corresponding type using the rules above.
This method ensures accurate classification and enhances your understanding of chemical reactions.