Paper 2 - Mistakes Flashcards
How does enzyme effect rate of reaction
- speeds up
- creates alternative pathway
- lowers activation energy
Conditions for cracking
- silica/alumina
+ 600 degrees
Temperature and pressure required for steam
- 300 degrees and 60atm
phenolphthalein acid
colourless
phenolphthalein neutral
colourless
phenolphthalein alkali
pink
methyl orange acid
red
methyl orange neutral
yellow
methyl orange alkali
yellow
Definition of compound
- two different elements
- bonded together
Why is something malleable
same as ductility
- weak interlayer forces
- layers are weak
- so the can slide easily
Why does pressure increase rate
- particles closer
- more collisions per unit time
How to test for a carboxylic
- magnesium
- fizzing
Titration
- mix
- filter
- wash
- dry
Why potassium more reactive than sodium [3 marks]
- more electron shells between nucleus and valence shell
- weaker attraction between
- lost more easily
How is crude oil seperated in fraction column [4 marks]
- crude oil heated
- (temp grad) hotter at bottom cooler at top
- ccompounds rise up the column
- comndense at bpt
How does nitrous oxide form in car
- reacts with O2
- due to high temps
Why is an alloy harder than a metal [3 marks]
- layers are less even
- because of different size molecules
- layers cannot slide
Why is a reaction exothermic in terms of bonds [2 marks]
- more energy given out when bonds are created
- than when they are broken
What courses glucose to ferment [1 mark]
- yeast
Why is fermentation done in the absence of air [2 marks]
- oxygen would react with with ethanol
- form ethanoic
