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Questions and Answers
What is the oxidation number of an atom in a chemical compound or in a polyatomic ion?
What is the oxidation number of an atom in a chemical compound or in a polyatomic ion?
The theoretical ion charge of the atom.
What is the fundamental property of redox reactions?
What is the fundamental property of redox reactions?
One participant will be oxidised and another participant will be reduced by the transfer of one or more electrons.
What happens when a particle is reduced?
What happens when a particle is reduced?
Its oxidation number decreases.
What is the sum of a reduction reaction and an oxidation reaction?
What is the sum of a reduction reaction and an oxidation reaction?
Why are Roman numbers used for oxidation numbers?
Why are Roman numbers used for oxidation numbers?
What is the oxidation number of Fe2+ in the reaction Fe3+ + e- → Fe2+?
What is the oxidation number of Fe2+ in the reaction Fe3+ + e- → Fe2+?
What happens to the oxidation number of a particle when it is oxidised?
What happens to the oxidation number of a particle when it is oxidised?
What is the function of an oxidising partner in a redox reaction?
What is the function of an oxidising partner in a redox reaction?
What is the definition of a reduction in a chemical reaction?
What is the definition of a reduction in a chemical reaction?
What is the oxidation number (ON) of oxygen in a compound?
What is the oxidation number (ON) of oxygen in a compound?
How are chemical names written to include the oxidation number of the cation?
How are chemical names written to include the oxidation number of the cation?
What is the minimum requirement for a reaction to be considered a redox reaction?
What is the minimum requirement for a reaction to be considered a redox reaction?
What is the oxidation number of single atomic particles with no charge and elements?
What is the oxidation number of single atomic particles with no charge and elements?
What is the sum of oxidation numbers of all atoms in a molecule without a charge?
What is the sum of oxidation numbers of all atoms in a molecule without a charge?
What is the oxidation number (ON) of an element?
What is the oxidation number (ON) of an element?
What happens to the oxidation number (ON) of M in the reaction M + O2 → MO?
What happens to the oxidation number (ON) of M in the reaction M + O2 → MO?
What happens to the oxidation number of a reactant when it releases one or more electrons?
What happens to the oxidation number of a reactant when it releases one or more electrons?
Which of the redox pairs has the highest redox potential?
Which of the redox pairs has the highest redox potential?
What is the purpose of adding NH3 (c = 2 mol/L) to the solution in the experiment?
What is the purpose of adding NH3 (c = 2 mol/L) to the solution in the experiment?
What is the oxidising agent in the reaction between copper and nitric acid?
What is the oxidising agent in the reaction between copper and nitric acid?
What is the purpose of using deionised water in the experiment?
What is the purpose of using deionised water in the experiment?
What is the role of the gas collecting device in Experiment 4.2?
What is the role of the gas collecting device in Experiment 4.2?
Why is it important to wear gloves and eye protection during the experiment?
Why is it important to wear gloves and eye protection during the experiment?
What is the difference in the reaction between aluminium and hydrochloric acid versus nitric acid?
What is the difference in the reaction between aluminium and hydrochloric acid versus nitric acid?
What is the purpose of the gas collecting device in the experiment?
What is the purpose of the gas collecting device in the experiment?
Why does the reaction of HCl with Aluminium need a significant amount of time to speed up?
Why does the reaction of HCl with Aluminium need a significant amount of time to speed up?
Why do we not see a reaction happen between Aluminium and HNO3?
Why do we not see a reaction happen between Aluminium and HNO3?
What gas is produced according to the test with the gas collecting device?
What gas is produced according to the test with the gas collecting device?
What is the purpose of writing the reaction equation of the formation of the compound on the surface of Aluminium?
What is the purpose of writing the reaction equation of the formation of the compound on the surface of Aluminium?
Is the reaction between HCl and Aluminium a redox reaction?
Is the reaction between HCl and Aluminium a redox reaction?
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