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Paper 1 CHEM MMS EXAM > ✅3 - Redox I > Flashcards

✅3 - Redox I Flashcards

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1
Q

What is a redox reaction?

A

One which involved reduction and oxidation

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2
Q

What is an oxoanion?

A

An ion with oxygen within it, formed by both metals and non metals

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3
Q

What is a half equation?

A

An ionic equation used to describe either the loss or gain of electrons during a redox reaction

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4
Q

What are displacement reactions?

A

Redox reactions which can be used to compare the relative strengths of metals as reducing agents and non-metals as oxidising agents.

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5
Q

What are spectator ions?

A

Ions which are present in solution but take no part in the reaction

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6
Q

If the oxidation number gets more positive the compound has been…

A

…oxidised

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7
Q

If the oxidation number of a compound decreases, it has been…

A

…reduced

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8
Q

The oxidation of all uncombined elements is…

A

…zero

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9
Q

If an ion is made of one element, the oxidation number is…

A

… the charge on the ion

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10
Q

The sum of the oxidation numbers in a neutral compound is…

A

…zero

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11
Q

The sum of oxidation numbers or an ion is…

A

…the charge on the ion

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12
Q

What are the oxidation numbers for group 1 elements?

A

+1

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13
Q

What happens to oxidising agents?

A

They oxidise other species while themselves being reduced

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14
Q

What happens to reducing agents?

A

They reduce other species while themselves being oxidised

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15
Q

What happens to metals when they form compounds?

A

They generally donate electrons to form positive ions

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16
Q

What happens to non-metals when they form compounds?

A

They generally gain electrons to form negative ions

17
Q

What can be used to balance half equations?

A

H+, H2O and e-

18
Q

Why would you use H2O to balance a half equation?

A

If there were more Oxygen on one side unaccounted for

19
Q

How can you balance charges in half equations?

A

By adding electrons to the more positive side

20
Q

When would you use H+ to balance a half equation?

A

To balance the hydrogen after water has been added

21
Q

When combining half equations, what should you make sure?

A

That the number of electrons in each are the same, multiplying them if need be

Paper 1 CHEM MMS EXAM (12 decks)

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