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A level Chemistry Paper 1- Foundations in Chemsitry > Redox > Flashcards

Redox Flashcards

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1
Q

What are oxidation numbers given?

A

Roman numerals

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2
Q

What is the oxidation number of an uncombined element?

A

0

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3
Q

What do the oxidation numbers of all the atoms in a molecule add up to?

A

0

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4
Q

What is the oxidation number of a simple ion?

A

the charge of the ion

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5
Q

What are the oxidation numbers of group 1, group 2 and group 3 metals?

A

+1
+2
+3

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6
Q

What the oxidation number of a fluorine atom?

A

-1

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7
Q

What is the oxidation number of a hydrogen atom?

A

+1 (NaH is an exception)

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8
Q

What is the oxidation number of oxygen?

A

-2

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9
Q

What is oxidation?

A

-loss of electrons
-increase in oxidation number

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10
Q

What is reduction?

A

-Gain of electrons
-Decrease in oxidation number

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11
Q

When analysing reactions what is oxidation?

A

-loss of hydrogen
-gain of oxygen

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12
Q

When analysing organic reactions what is reduction?

A

-gain of hydrogen
-loss of oxygen

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13
Q

When calculating the oxidation number what should you start with?

A

-metal first unless it is a transitional metal

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14
Q

What are spectator ions?

A

ions that remain uncharged

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15
Q

What happens to a reducing agent?

A

it becomes oxidised

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16
Q

what happens to the oxidising agent?

A

it becomes reduced

17
Q

What are the other names for the oxidising and reducing agent?

A

-Oxidant
-Reductant

18
Q

What does -ate mean?

A

-negative ion know it’s oxygen

19
Q

What is disproportionation?

A

a type of redox reaction where the same element is both oxidised and reduced

20
Q

What the chemical accepting the electrons in a redox reaction?

A

oxidising agent

21
Q

What is the chemical donating the electrons in a redox reaction called?

A

the reducing agent

22
Q

What does the electron configuration of an atom describe?

A

the arrangement of electrons in the shells

23
Q

How are electrons placed?

A

Into shells- starting with the lowest energy level first

A level Chemistry Paper 1- Foundations in Chemsitry (7 decks)

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