Oxidation-Reduction Reactions Worksheet
Grade 9 Science worksheet on oxidation-reduction reactions, covering definitions, identifying oxidizing/reducing agents, and balancing equations.
Includes
Standards
Oxidation-Reduction Reactions
Name:
Date:
Score:
Read each question carefully and provide your best answer. Show all your work for calculations.
1. What happens to a substance when it undergoes oxidation?
It gains electrons.
It loses electrons.
Its oxidation number decreases.
It acts as an oxidizing agent.
2. In the reaction $2Na + Cl_2 \rightarrow 2NaCl$, which element is oxidized?
Na
$Cl_2$
Both Na and $Cl_2$
Neither Na nor $Cl_2$
1. Reduction is the gain of oxygen.
True
False
2. An oxidizing agent causes another substance to be oxidized and is itself reduced.
True
False
1. In an oxidation-reduction reaction, the substance that loses electrons is said to be .
2. The oxidation number of an uncombined element is always .
1. Define oxidation and reduction in terms of electron transfer.
2. Identify the oxidizing agent and the reducing agent in the following reaction: $Mg + S \rightarrow MgS$
Match each term on the left with its definition on the right.
1. Oxidizing agent
a. Gains electrons
2. Reducing agent
b. Loses electrons
3. Oxidation
c. Causes oxidation, is reduced
4. Reduction
d. Causes reduction, is oxidized
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