R3.2
In the reaction between chlorine gas and potassium iodide:
Cl2(g) + 2KI(aq) → 2KCl(aq) + I2(aq)
The oxidising agent is chlorine because it is getting reduced as its oxidation state decreases.
True or false?
True
What is a free radical?
This type of species has an unpaired electron and is highly reactive.
A __________ is a reactant that forms a bond to its reaction partner (the electrophile) by donating both bonding electrons.
Fill in the blank
nucleophile
List the differences between electrolytic and voltaic cells:
Voltaic cells:
- convert chemical energy to electrical energy
- Energy from spontaneous exothermic chemical reactions is converted to electrical energy
- Energy is released
Electrolytic cells:
- Convert electrical energy to chemical energy
- Energy is provided to generate a non-spontaneous chemical reaction
- Energy is required
What is homolytic fission?
This type of bond breaking produces two radicals and occurs during the initiation step.
Identify the which reaction is Heterolytic vs Homolytic
top - homolytic,
bottom - heterolytic
Fill in the Blank:
The hydrolysis of water is a form of ___ that occurs according to the following overall chemical reaction: H2O(l) -->1/2 O2(g)+H2(g)
electrolysis
What is ultraviolet (UV) light?
This form of energy is required to initiate the halogenation of alkanes by breaking the halogen bond.
Which of the following molecules acts as the nucleophile in the reaction C2H5Br + HCl → C2H5Cl + HBr?
HCl
What is the color change for an unsaturated carbon test?
brown to colorless
What is propagation?
This step in free radical substitution involves a radical reacting with a stable molecule to form a new radical.
Identify the movement of electrons and where arrow electron- indicators would go in the following reaction:
answer on Ezzio's laptop
The presence of the hydroxyl functional group makes alcohols susceptible to oxidation in the presence of a suitable oxidising agent. describe their function. (you don't need to know the names of the oxidizing agent)
During the reaction, the oxidising agent removes electrons from the alcohol (or aldehyde) and becomes reduced. In the process, the oxidising agent changes colour
Correct propagation step:
what is CH3• + Cl2 = CH3Cl + Cl•
This is the propagation step when methane reacts with chlorine, forming chloromethane and a chlorine radical.
What is the product of the reaction below
answer on Ezzios Laptop