Electrolysis

Question 1

what does extracting metals mean?

Answer 1

getting them from the earth so we can use them

Question 2

Define Ore

Answer 2

rock that contains a metal that has reacted with oxygen

Question 3

what is reduction reaction

Answer 3

when a metal oxide is heated with carbon to remove the oxygen

Question 4

which metals do reduction reactions work for

Answer 4

metals less reactive than carbon

Question 5

define displacement reaction

Answer 5

more reactive element displaces less reactive element in a compound

Question 6

define oxidation in terms of reaction

Answer 6

oxidation is gaining oxygen

Question 7

Define reduction in terms of electrons

Answer 7

reduction is losing oxygen

Question 8

what is the word equation for a reduction reaction

Answer 8

metal oxide + carbon + metal

Question 9

what is electrolysis used for

Answer 9

using electricity to break down ionic compounds to extract electricity

Question 10

define electrolysis

Answer 10

breaking down of a substance using electricity

Question 11

what happens to the positive ions in electrolysis

Answer 11

attract to negatives electrode because opposites attract

Question 12

what happens to negative ions in electrolysis

Answer 12

attract to positive electrode because opposites attract

Question 13

which state of matter do ionic compounds need to be in for electrolysis to work

Answer 13

must be molten or dissolved

Question 14

how do they lower the melting point of aluminum oxide before electrolysis and why

Answer 14

must add cryoliite to lower melting point and to save money

Question 15

what does electrolysis in solution mean

Answer 15

ionic compound dissolved in water

Question 16

in electrolysis of solution what forms at the negative electrode

Answer 16

the least reactive positive ion

Question 17

in electrolysis of solution what forms at the negative electrodes.

Answer 17

the group 7 element. if there is no group 7 element then oxygen forms