electrolosis

Question 1

what does extracting metals mean

Answer 1

getting them from the earth so we can use them

Question 2

define core

Answer 2

rock that contains a metal that has reacted with oxygen

Question 3

what is a reduction reaction

Answer 3

when a metal oxide is heated with carbon to remove 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 elements displace less reactive elements in a compound

Question 6

define oxidation in terms of electrons

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
carbon dioxide +metal

Question 9

what is electrolysis used for

Answer 9

using electricity to break down ionic compound to extract materials

Question 10

define electrolysis

Answer 10

breaking down the substance using electricity

Question 11

what happens to positive ions in electrolysis

Answer 11

attracts to negative electrode because opposites attract

Question 12

attracts to positive electrode because opposite attract

Answer 12

attracts 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

Question 14

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

Answer 14

must add cryolite to lower melting point and to save money