
Electrolysis
Presentation
•
Biology
•
10th Grade
•
Practice Problem
•
Medium
SAMANTHA CHEW
Used 56+ times
FREE Resource
3 Slides • 15 Questions
1
2
Multiple Choice
Molten NaCl can conduct electricity because
Ions are dissolved in water
Ions are mobile
Ions are arranged in a lattice arrangement
3
Multiple Choice
Molten NaCl contains
Na+ and Cl- ions
Na and Cl atoms
Na and Cl2 molecules
4
Multiple Choice
Na+ is a ..........., Cl- is .................
cation, anion
anion, cation
5
Multiple Choice
During electrolysis, cations will move to the ..............., anions will move to the ..............
anode, cathode
cathode, anode
6
Poll
Which of these 2 ions will donate electron(s)?
Cl-
Na+
7
Draw
Since Cl- will donate electron, show the reaction using a half equation
8
Multiple Choice
Cl- is ................... by ............. electrons
reduced, gaining
oxidised, gaining
oxidised, losing
reduced, losing
9
Multiple Choice
Since Cl atoms do not have a full outer shell, they will share electrons with another Cl atom to form
Cl2 molecules
Cl2 atom
Cl- ion
10
11
Open Ended
What is the difference between a concentrated vs a molten eletrolyte?
12
Multiple Choice
In the electrolysis of concentrated aqueous NaCl, the 4 ions which are present in the electrolyte are :
OH+, Cl-, Na+ and H-
OH-, Cl-, Na+ and H+
H2O and Na+ and Cl-
13
Open Ended
Which ions move to the cathode?
14
Multiple Choice
For concentrated electrolyte, at the cathode, there were Na+ and H+ ions. Which one will be discharged? Follow the discharge series
H+ ion
Na+ ion
15
Multiple Choice
For concentrated electrolyte, at the anode, there were OH-and Cl- ions. Which one will be discharged? DO NOT Follow the discharge series
Cl- ion
OH- ion
16
17
Multiple Choice
Electrolysis of concentrated lithium bromide, LiBr.
Ions in electrolyte: Li+, H+, Br-, OH-
Anode: Bromine
Cathode: Hydrogen
Anode: oxygen
Cathode: Lithium
Anode: Bromine
Cathode: lithium
18
Multiple Choice
Electrolysis of concentrated sodium bromide, NaBr.
Ions in electrolyte: Na+, H+, Br-, OH-
Anode: Bromine
Cathode: sodium
Anode: Bromine
Cathode: Hydrogen
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