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Oxidation State
Balancing Equations
Terms
Oxidizing/Reducing Agents
Miscellaneous
100
The oxidation state of carbon in CH4.
What is -4?
100
Balance the following equation: HCl + HNO3 --> HOCl + NO + H2O.
What is 3HCl + 2HNO3 --> 2HOCl + 2NO + H2O?
100
An oxidizing agent.
What is a compound or molecule that is reduced?
100
Identify the oxidizing agent in this reaction: 2Br- + Cl2 --> Br2 + 2Cl-.
What is Cl2?
100
Loss of electrons.
What is oxidation?
200
The oxidation state of arsenic in AsO4 3-.
What is +5?
200
Balance the following equation using the redox method: Cr2O7 2- → Cr3+
What is Cr2O7 2- + 7H2O + 6e- --------------> 14OH- + 2Cr3+?
200
A reducing agent.
What is a compound or molecule that is oxidized?
200
Identify the reducing agent in this reaction: 2Ce + 3Cu2+ --> 3Cu + 2Ce3+.
What is Ce?
300
The oxidation state of chromium in CrO4 2-.
What is +6?
300
Balance the following equation: SO4 2- → SO2
What is 2H2O + 2e- + SO4 2- --> SO2 + 4OH-?
300
A method used to balance equations based on assigning oxidation numbers to elements in the reaction equation.
What is the oxidation-number method?
300
Identify the oxidizing agent in this reaction: 2Zn + O2 --> 2ZnO.
What is O2?
300
Oxidation or reduction: NH3 ---> NO2
What is oxidation?
400
The oxidation state of nitrogen in NH4 +.
What is -3?
400
Balance the following equation: TeO3 2- + N2O4 → Te + NO3-
What is TeO3 2- + 2N2O4 + H2O ---> Te + 4NO3- + 2H+?
400
Number assigned to an atom or ion to indicate its degree of oxidation or reduction.
What is an oxidation number?
400
Identify the reducing agent in this reaction: Mg + I2 --> MgI2.
What is Mg?
400
Balance the following equation: H2O2 + Cr2O7 2- → O2 + Cr3+.
What is 8H+ + 3H2O2 + Cr2O7 2- ---> 3O2 + 2Cr3+ + 7H2O?
500
The oxidation state of carbon in carbon dioxide.
What is +4?
500
Balance the following equation: IO3- + Re → ReO4- + IO-.
What is 7IO3- + 4OH- + 4Re -------> 4ReO4- + 7IO- + 2H2O?
500
A reaction in which electrons are transferred from one substance to another.
What is a redox or oxidation-reduction reaction?
500
Identify the oxidizing agent in this reaction: H2S + Cl2 --> S + 2HCl.
What is Cl2?
500
Balance the following equation: Pb2+ + IO3- → PbO2 + I2
What is 8H+ + 5PbO2 + I2 --->5Pb2+ + 2IO3- + 4H2O?