Types of Reactions worksheet - Free Printable

To solve the problem, we need to identify the type of chemical reaction for each given equation or description. Let's go through each one step by step.

Key Definitions:

1. Synthesis Reaction: Two or more substances combine to form a single product.
- General form: \( A + B \rightarrow AB \)

2. Decomposition Reaction: A single compound breaks down into two or more simpler substances.
- General form: \( AB \rightarrow A + B \)

3. Single Displacement Reaction: One element replaces another element in a compound.
- General form: \( A + BC \rightarrow AC + B \)

4. Double Displacement Reaction: Two compounds exchange ions to form two new compounds.
- General form: \( AB + CD \rightarrow AD + CB \)

5. Combustion Reaction: A substance reacts with oxygen, often producing heat and light.
- General form: \( Fuel + O_2 \rightarrow CO_2 + H_2O \) (commonly)

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Solutions:

#### a. \( KClO_3 \rightarrow KCl + O_2 \)
- Type: Decomposition
- Explanation: A single compound (\( KClO_3 \)) breaks down into two simpler substances (\( KCl \) and \( O_2 \)).

#### b. \( NaOH + FeCl_3 \rightarrow NaCl + Fe(OH)_3 \)
- Type: Double Displacement
- Explanation: Two compounds (\( NaOH \) and \( FeCl_3 \)) exchange ions to form two new compounds (\( NaCl \) and \( Fe(OH)_3 \)).

#### c. \( K + H_2O \rightarrow KOH + H_2 \)
- Type: Single Displacement
- Explanation: The element \( K \) replaces \( H \) in \( H_2O \), forming \( KOH \) and \( H_2 \).

#### d. \( CaBr_2 + Na_2CO_3 \rightarrow CaCO_3 + 2NaBr \)
- Type: Double Displacement
- Explanation: Two compounds (\( CaBr_2 \) and \( Na_2CO_3 \)) exchange ions to form two new compounds (\( CaCO_3 \) and \( NaBr \)).

#### e. \( C_{12}H_{22}O_{11} + 12O_2 \rightarrow 12CO_2 + 11H_2O \)
- Type: Combustion
- Explanation: A carbohydrate (\( C_{12}H_{22}O_{11} \)) reacts with oxygen (\( O_2 \)) to produce carbon dioxide (\( CO_2 \)) and water (\( H_2O \)).

#### f. \( \bigcirc + \bullet \rightarrow \bigcirc\bullet \)
- Type: Synthesis
- Explanation: Two different elements (\( \bigcirc \) and \( \bullet \)) combine to form a single compound (\( \bigcirc\bullet \)).

#### g. \( \bigcirc + \bigcirc\bullet \rightarrow \bigcirc\bigcirc + \bullet \)
- Type: Single Displacement
- Explanation: The element \( \bigcirc \) replaces \( \bullet \) in the compound \( \bigcirc\bullet \), forming \( \bigcirc\bigcirc \) and \( \bullet \).

#### h. \( \bigcirc\bullet \rightarrow \bigcirc + \bullet \)
- Type: Decomposition
- Explanation: A single compound (\( \bigcirc\bullet \)) breaks down into two simpler substances (\( \bigcirc \) and \( \bullet \)).

#### i. \( \bigcirc\bullet + \bigcirc\bigcirc \rightarrow \bigcirc\bigcirc\bullet + \bigcirc \)
- Type: Double Displacement
- Explanation: Two compounds (\( \bigcirc\bullet \) and \( \bigcirc\bigcirc \)) exchange parts to form two new compounds (\( \bigcirc\bigcirc\bullet \) and \( \bigcirc \)).

#### j. "Two or more substances form a new substance"
- Type: Synthesis
- Explanation: This is the definition of a synthesis reaction.

#### k. "One substance breaks down into two or more simpler substances"
- Type: Decomposition
- Explanation: This is the definition of a decomposition reaction.

#### l. "One element replaces another element in a compound"
- Type: Single Displacement
- Explanation: This is the definition of a single displacement reaction.

#### m. "Two compounds are combined and switch partners"
- Type: Double Displacement
- Explanation: This is the definition of a double displacement reaction.

#### n. "Burning results in water and carbon dioxide"
- Type: Combustion
- Explanation: This describes a combustion reaction where a fuel reacts with oxygen to produce \( CO_2 \) and \( H_2O \).

#### o. \( A + B \rightarrow AB \)
- Type: Synthesis
- Explanation: Two substances (\( A \) and \( B \)) combine to form a single product (\( AB \)).

#### p. \( AB \rightarrow A + B \)
- Type: Decomposition
- Explanation: A single compound (\( AB \)) breaks down into two simpler substances (\( A \) and \( B \)).

#### q. \( AB + CD \rightarrow AD + CB \)
- Type: Double Displacement
- Explanation: Two compounds (\( AB \) and \( CD \)) exchange parts to form two new compounds (\( AD \) and \( CB \)).

#### r. \( AB + C \rightarrow AC + B \)
- Type: Single Displacement
- Explanation: The element \( C \) replaces \( B \) in the compound \( AB \), forming \( AC \) and \( B \).

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Final Answer:

\[
\boxed{
\begin{array}{ll}
a. & \text{Decomposition} \\
b. & \text{Double Displacement} \\
c. & \text{Single Displacement} \\
d. & \text{Double Displacement} \\
e. & \text{Combustion} \\
f. & \text{Synthesis} \\
g. & \text{Single Displacement} \\
h. & \text{Decomposition} \\
i. & \text{Double Displacement} \\
j. & \text{Synthesis} \\
k. & \text{Decomposition} \\
l. & \text{Single Displacement} \\
m. & \text{Double Displacement} \\
n. & \text{Combustion} \\
o. & \text{Synthesis} \\
p. & \text{Decomposition} \\
q. & \text{Double Displacement} \\
r. & \text{Single Displacement} \\
\end{array}
}
\]