Topic 3 Flashcards Preview

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Flashcards in Topic 3 Deck (20):
1

free electrons in an electrolyte

conduct electricity

2

oxidation is

loss of electrons

3

reduction is

gain of electrons

4

positive ions are cations and attracted to the

cathode

5

negatives ions are aniona and attracted to the

anode

6

name of equations in electrolysis

half equations

7

when in solution there are also

h+ and oh- ions

8

simplest ions are discharged in the order;

chlorine, rather than oh rather than so4

9

metal will be discharged at cathode if it's less reactive than

hydrogen

10

most reactive thing stays in compound so

is not discharged

11

is purified by electrolysis

copper

12

pure copper gathers at the

cathode

13

at the anode there is just a lump of

impure copper

14

Cu2+ + 2e- --->

Cu

15

Cu --->

Cu2+ + 2e-

16

coating the surface of a metal with another metal using electricity

electroplating

17

where the object you're going to plate it

cathode

18

where the bar of the metal used for the plating is

anode

19

could be used as electrolyte

silver nitrate solution

20

electroplating uses

jewellery; shiny and attractive, prevention of corrosion; some metals corrode like cutlery and cooking utensils