AS Paper 2 mistakes Flashcards
How to convert from KJg-1 to KJmol-1?
Multiply by mr
In a reaction between sodium carbonate and hydrochloric acid, give 2 reasons why less carbon dioxide than expected was collected?
Some CO2 will have escaped before bung is replaced.
The gas is slightly soluble in acid
What are the reagents and conditions required when chloropropane is converted to propene?
KOH
Ethanol solvent and warm
Which type of halogenoalkane hydrolyse the fastest?
Tertiary halogenoalkanes
What would be the reagent and conditions required to convert an alkene into an alkane?
Hydrogen gas
Nickel catalyst
What commercially important product can be manufactured by converting alkenes into alkanes?
Margarine
Why may the data booklet values for enthalpy change of combustion may not be entirely accurate?
Data book enthalpies refer to gaseous state, some molecules may be in a different state.
What would you expect when 2-methylpropan-2-ol is heated with potassium dichromate?
No change
Tertiary alcohol
