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Redox
Indicate the oxidation number of an element in a compound using Roman numerals.
13
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130
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91
Questions
90 min
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CambridgeIGCSEChemistryChemical reactions
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Redox outcomes13 objectives
- Indicate the oxidation number of an element in a compound using Roman numerals.
- Describe redox reactions as processes that involve both oxidation and reduction occurring simultaneously.
- Explain oxidation as the process of gaining oxygen and reduction as the process of losing oxygen.
- Recognize redox reactions as those that involve the gain and loss of oxygen.
- Determine which processes are oxidation and which are reduction in redox reactions.
- Define oxidation in terms of losing electrons and an increase in oxidation number.
- Define reduction in terms of gaining electrons and a decrease in oxidation number.
- Identify redox reactions as those that involve the gain and loss of electrons.
- Recognize redox reactions by observing changes in oxidation numbers, including: (a) elements in their uncombined state have an oxidation number of zero (b) the oxidation number of a monatomic ion equals its charge (c) the total oxidation numbers in a compound sum to zero (d) the total oxidation numbers in an ion equal its charge.
- Identify redox reactions by noting the color changes that occur when using acidified aqueous potassium manganate(VII) or aqueous potassium iodide.
- Define an oxidising agent as a substance that causes oxidation in another substance while being reduced itself.
- Define a reducing agent as a substance that causes reduction in another substance while being oxidised itself.
- Identify oxidising and reducing agents in various redox reactions.
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