Chemistry Paper 2 Focus

?
How do you test for the presence of sulfate ions in a solution?
1. Add barium chloride
2. Add hydrochloric acid
3. If positive, white precipitate produced
1 of 19
What name is given to a useful product? e.g alcoholic spirits
Formulation
2 of 19
When sodium is burned, what colour flame is produced?
Yelllow
3 of 19
Suggest why ammonia condenses in a condenser but other gases do not.
Ammonia has a higher boiling point than the other gases.
4 of 19
Name the gas produced when sodium is added to ethanol.
Hydrogen
5 of 19
Name 2 processes which led to the formation of the Earth's early atmosphere changing.
Plants grew = photosynthesis
CO2 dissolved in oceans
6 of 19
Why are scientists NOT certain about the percentage of every gas in the Earth's early atmosphere?
No evidence
7 of 19
RF value =
distance travelled by solute
-----------------------------
distance travelled by solvent
8 of 19
What type of substance reacts with propanol to produce propanoic acid?
Oxidising agent
9 of 19
Polyesters are produced when monomers join together and lose a small molecule.
Name the small molecule lost.
Water
10 of 19
Explain how carbon monoxide is produced when petrol is burned in car engines.(2)
Incomplete combustion because there is limited oxygen
11 of 19
How are oxides of nitrogen produced when petrol is burned in car engines?(2)
Nitrogen reacts with oxygen at a high temperature
12 of 19
Give two effects of nitrogen dioxides as atmospheric pollution
Acid rain
Respiratory problems
13 of 19
In a reaction, the forward reaction is exothermic.
Explain what happens to the yield of product if a higher temperature is used.
It decreases because the backwards reaction is endothermic so energy is taken in from surroudings
14 of 19
Explain how a catalyst increases the rate of reaction(2)
Provides a different reaction pathway
With a lower activation energy
15 of 19
What is the effect of using a catalyst on equilibrium yield of a product?
No effect
16 of 19
Give 2 properties of thermosetting polymers
Do not melt when heated
Rigid interlocking structure with strong cross-link bonds
17 of 19
Explain why higher pressure gives greater yield AND increased rate of reaction.(4)
The equilibrium moves to the right because there are fewer particles now on the right.
At higher pressure, there are more collisions occurring, so more particles per unit volume.
18 of 19
Give 2 properties of thermosoftening polymers.
Melt when heated
No cross-links
19 of 19

Other cards in this set

Card 2

Front

What name is given to a useful product? e.g alcoholic spirits

Back

Formulation

Card 3

Front

When sodium is burned, what colour flame is produced?

Back

Preview of the front of card 3

Card 4

Front

Suggest why ammonia condenses in a condenser but other gases do not.

Back

Preview of the front of card 4

Card 5

Front

Name the gas produced when sodium is added to ethanol.

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Paper 2 resources »