electrolysis paper

Question 1

explain how hydroxine slows corrosion

Answer 1

hydroxine reacts with the O2 in the water, changing it to 2H2O
This means no O2 is left to corrode the metals

Question 2

explain the copper mass results

Answer 2

Anode: Cu -> Cu2+ +2e-
(copper atoms become copper ions by losing two electrons)

Cathode: Cu2+ + 2e- -> Cu
(copper ions become copper atoms by gaining two electrons)

Question 3

why is copper alloyed with aluminium

Answer 3

copper slides off aluminium easily
aluminium doesn’t slide off copper easily
this is bc they are two diff sized atoms

Question 4

electrolysis definition

Answer 4

an electric current flows through an electrolyte, decomposing it into its two ions

Question 5

define squeaky pop set

Answer 5

put a lit splint into a tube of gas. if hydrogen is present you will hear a squeaky pop

Question 6

hydroxide discharged equation

Answer 6

4OH- -> 2H2O + O2 + 4e-