Oxidation and Reduction
Chemistry ⇒ Redox Reactions and Electrochemistry
Oxidation and Reduction starts at 10 and continues till grade 12.
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See sample questions for grade 11
Assign the oxidation number to nitrogen in NO3-.
Assign the oxidation number to phosphorus in H3PO4.
Calculate the change in oxidation number of manganese in the reaction: 2MnO4- + 5C2O42- + 16H+ → 2Mn2+ + 10CO2 + 8H2O
Calculate the oxidation number of chromium in K2Cr2O7.
Describe the steps to assign oxidation numbers to atoms in a polyatomic ion.
Describe what is meant by a reducing agent in a redox reaction.
Explain why the oxidation number of hydrogen is +1 in most compounds but -1 in metal hydrides.
Explain why the reaction between hydrogen and oxygen to form water is a redox reaction.
Identify the species that is oxidized in the following reaction: Zn + CuSO4 → ZnSO4 + Cu
In the reaction: 2Fe2+ + Cl2 → 2Fe3+ + 2Cl-, which species is the reducing agent?
In the reaction: 2H2O → 2H2 + O2, which element is reduced?
In the reaction: Cl2 + 2Br- → 2Cl- + Br2, which species is oxidized?
State the oxidation number of chlorine in NaClO3.
