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EDEXCEL Chemistry a level > Redox reactions > Flashcards

Flashcards in Redox reactions Deck (15)
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1

oxidation

addition of oxygen/ loss of electrons

2

reduction

loss of oxygen/gain of electrons

3

oxidising agent

a species that receives electrons from another species, receiving one or more electrons, meaning it is therefore reduced.

4

reducing agent

a species that donates electrons to another species, donating one or more so that it is then oxidised

5

oxidation number

the charge that an ion has or the charge it would have if it were fully ionic.

6

oxidation number of uncombined element

ZERO

7

sum of oxidation numbers of neutral compound

ZERO

8

sum of oxidation numbers of all elements in an ion

CHARGE OF THE ION

9

oxidation number of more electronegative ion in a substance

NEGATIVE

10

oxidation number of fluorine

-1

11

oxidation number of hydrogen

+1 unless combined with a less electronegative element when is -1)

12

oxidation number of oxygen

-2 (except in peroxide when is -1)

13

what happens to oxidation number in oxidation?

increases

14

what happens to oxidation number in reduction?

decreases

15

disproportionation

simultaneous oxidation and reduction of an element in a single reaction,