FC 9-26 Flashcards
Define electronegativity.
The ability of an atom to attract the bonding electrons in a covalent bond.
What is the oxidation state of elements in elemental state?
0.
What is the oxidation state of a simple ion?
The charge on the ion.
Colour of Chlorine in aqueous solution.
Pale yellow.
Colour of Bromine in aqueous solution.
Orange.
Colour of Iodine in aqueous solution.
Brown.
Colour of Chlorine in Cyclohexane.
Pale yellow.
Colour of Bromine in Cyclohexane.
Orange.
Colour of Iodine in Cyclohexane.
Purple.
Aqueous Chlorine reacts with water in a disproportionation reaction to form what?
HCl and HOCl (Chloric acid).
Chlorine reacts with cold, dilute, aqueous NaOH in a disproportionation reaction to form what?
NaCl, NaClO (Sodium Chlorate) and Water.
How would you test for the Carbonate ion?
Add dilute nitric acid, and check for effervescence.
How would you test for the Sulphate ion?
Add barium nitrate, and check for a white precipitate.
How would you test for the ammonium ion?
Warm your unknown solution, and add aqueous NaOH. Check for ammonia gas being released using damp red litmus paper. It will turn blue if ion is present.
Define homologous series.
A series of compounds that have the same general formula and functional group, and which successive members differ by an extra CH2 unit.
Define isomers.
Different compounds with the same molecular formula.
Define structural isomers.
Compounds with the same molecular formula but different structural formula.
By what mechanism do alkanes and halogens react?
Radical substitution.
Define stereoisomers.
Isomers with the same structural formula but a different arrangement in space.
How can you form an alkene from an alcohol?
Dehydrate the alcohol under heating and in the presence of a sulphuric acid catalyst.
How can you form alkanes from alkenes?
React the alkene with hydrogen under heating, in the presence of a nickel catalyst.
How can you form haloalkanes from alkenes?
By reacting the alkene with a GASEOUS hydrogen-halide, or just with a halogen molecule like chlorine. These are electrophilic addition reactions. The reaction can be used as a test for unsaturation, as (orange) bromine water will go colourless if it reacts.
How can you form an alcohol from an alkene?
By reacting the alkene with steam and a phosphoric acid catalyst. This is called hydration.
Define electrophile.
An electron pair acceptor.