foe each of the following,describe a simple qualitave test(READ BELOW THE QUESTION CONTINUES)?

Question

which could be carried out in the lab to distingwish between the following pairs of compounds.
NAI and NABR,
K2CO3 and K2SO4,
CH3CH3 and CH2=CH2,
CH3CH2OH and CH3CH2OCH2CH3,
OH and CH3CH2OH,

Answer 1

2. Heat into lime water. K2CO3 will turn it cloudy as CO2 is given off

3) Bromine water: An alkene will decolourise it.

4) Oxidise with acidified K2Cr2O7 under reflux. The first one will oxidise

I am afraid I do not know 1 or 5 without research.

Answer 2

1) The test for halagen ions (i.e. the bromide and iodide in the examples) is silver chloride solution. Chloride turns white. bromide cream and iodide yellow.

2) Add some acid to your 2 samples. The carbonate (K2CO3) will give off a gas. i.e. fizz. (if you collect the gas you can test with limewater and see it's CO2) the sulphate will do nothing.

3)The test for alkenes and alkanes is bromine water. Shake with your substance and only the alkene (CH2=CH2) will go clear the other will stay orange.

4) Ethanol (CH3CH2OH) will oxidise in the presence of acidified potassium dichromate (Turning from yellow to green). Ethoxyethane (CH3CH2OCH2CH3) will not.

5) OH and CH3CH2OH. red litmus paper/ U.I. OH ions are alkaline and turn them blue. Ethanol is neutral. No colour change.

Answer 3

What, geeez but you are clever. I have not got a clue:)