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WorksheetsRedox Reaction Quiz
Total questions: 8
Worksheet time: 15mins
What happens to an oxidizing agent (oxidant)?
its oxidation number decreases
its oxidation number increases
its oxidation number remains unchanged
its oxidation number becomes zero
Explain the role of an oxidizing agent in a redox reaction.
Oxidizing agent donates electrons to another substance and gets oxidized.
Oxidizing agent accepts electrons from another substance and gets reduced.
Oxidizing agent absorbs protons from another substance and gets reduced.
Oxidizing agent has no role in a redox reaction.
Describe the function of a reducing agent in a redox reaction.
It donates electrons to another substance, causing it to be reduced.
It accepts electrons from another substance, causing it to be oxidized.
It has no role in a redox reaction.
It neutralizes the acidity of the reaction.
What is the oxidation number of sulfur in H2SO4?
0
+2
-2
+6
What is the oxidation number of sulfur in Na2SO3?
+4
+6
+2
+8
Which equation represents a redox reaction?
NaOH + HNO3 → NaNO3 +H2O
CO2 + C → CO
2NaOH + MgCl2 → Mg(OH)2 + 2NaCl
CaCO3 + 2HCl → CaCl2 + H2O + CO2
Explain the steps involved in balancing a redox equation using the oxidation number method.
Balance the equation by trial and error
Ignore the charges on the atoms
Mix all the reactants together
Assign oxidation numbers, identify oxidation and reduction, write half-reactions, balance atoms and charges, multiply half-reactions, add together, and check for balance.
YOUR HOMEWORK:
What is the sequence of simplest whole-number coefficients of substances in the first balanced equation in question 3?
S + HNO3 → H2SO4 + NO
(a)
