Topic 3: Redox 1 Flashcards

1
Q

What does oxidation number mean?

A

A number that indicates how many electrons it has gained or lost.

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2
Q

How to calculate the oxidation number?

A

Allocation of oxidation number to a species follows a number of rules: The oxidation number of an ​element is zero​. Oxidation numbers in a ​neutral​compound add up to ​zero​. Oxidation numbers in a charged compound add up to​ total the charge​.

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3
Q

What does oxidation mean in terms of oxidation number?

A

Oxidation is the gain of electrons. When losing electrons, the oxidation numbers increases.

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4
Q

What does reduction mean in terms of oxidation number?

A

Reduction is the gain of electrons. When gaining electrons, the oxidation number decreases.

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5
Q

What is a disproportion reaction?

A

It is a reaction that involves an element in a single species being reduced and oxidised at the same time

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6
Q

What is a good way to classify reactions that have redox and disproportion

A

The use of oxidation numbers

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7
Q

How is an oxidation number of an element in a compound or ion indicated?

A

Using Roman numerals

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8
Q

What happens when metals lose electrons?

A

They form positive ions with an increase of oxidation number

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9
Q

What happens when non-metals gain electrons?

A

They form negative ions with a decrease in oxidation numbers

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