Things I Got Wrong In Past Papers Flashcards
Why might you use helium as a gas in a perfume ?
It is stable and will not react with anything
Besides polarity of the molecules, what is another factor that would affect the retention time of molecules during gas chromatography
Temperature of the columns
What happens when proteins cook
IT BREAKS HYDROGEN BONDS
Why would you leave an experiment
allows time to react
How to set up a burette (3 marks)
- rinse burette with the solution
- remove the filter funnel
- read from the bottom of meniscus
When talking about effects on equilibriums
Mention the rate forward/reverse is increased
Why do you use deionised water
In case of potential impurities (metal ions etc.)
What does the valency mean about bonding
It has the amount of bonds as it does valency
Eh=
Enthalpy (kJ) / moles
When increasing temperature it allows sufficient energy to
Pass activation energy
State the type of bonding and structure ..
Make sure to mention the group like -covalent molecular-
Describe FULLY a method that the student could have used to accurately measure the mass 10cm^3 of each sucrose solution
- Using a pipette
- describe weighing by difference
On Line graphs
Use best fit
When asked why te differences in booking points
Look for effects of branches
The length of certain sections
What is electro negativity
The attraction an atom has for its shared electrons
