Headstart

Question 1

What is the SLC conditions (Standard laboratory conditions)

Answer 1

• 25 degrees Celsius (298K)
• 100kPa
• 1M solutions (for electrochem series mainly)

Question 2

What is the formula to find mols when have volume at SLC only

Answer 2

n = V/Vm

Question 3

What is the universal gas equation?

Answer 3

PV=nRT (T in K)

Question 4

What is stoichiometry?

Answer 4

Uses the mole of known to find the mole of unknown using the mole ratio

Question 5

What is the other reactant called when one reactant is in excess?

Answer 5

A limiting reactant

Question 6

In redox reactions at electrodes, where does oxidation and reduction occur?

Answer 6

Oxidation = ALWAYS anode
Reduction = ALWAYS cathode

Question 7

Oxidation is… (4)

Answer 7

• a loss of electrons
• an increase in oxidation number
• the gaining of oxygen
• the loss of hydrogen

Question 8

Reduction is… (4)

Answer 8

• a gain of electrons
• a decrease in oxidation number
• the loss of oxygen
• the gain of hydrogen

Question 9

What is the Daniel Cell?

Answer 9

• The first electrochemical cell
• Anode = Zinc electrode in Zinc Sulphate
• Cathode = Copper electrode in Copper sulphate
• salt bridge is Potassium Nitrate

Question 10

What is the Electrical Potential?

Answer 10

It’s the comparison from the standard hydrogen electrode (0.00V).
The potential difference gives the potential voltage that could be produced from a particular reaction
Eg. +0.80V - (-0.44V) = +1.24V

Question 11

What does KOHES stand for?

Answer 11

K= Key
O = Oxygen
H = Hydrogen
E = Electrons
S = States
*make sure to check if basic or acidic solutions