organic analysis

Question 1

test for alkenes

Answer 1

add bromine water at room temp and shake

orange —–> colourless

Question 2

test for haloalkanes

Answer 2

add NaOH
acidify w NHO3
add AgNO3
add dilute ammonia when ppt forms
add conc ammonia

Question 3

observations for haloalkanes

Answer 3

white ppt for AgCL
cream ppt for AgBr
yellow ppt for AGI

Question 4

test for primary or secondary alcohols

Answer 4

add acidified potassium dichromate

if positive- orange ———> green

Question 5

how to distinguish between NaCl and BaCl2

Answer 5

reagent- h2so4
observation w NaCl- NVC
observation w BaCl2- white ppt

Question 6

how to distinguish between NaCl and Na2co3

Answer 6

reagent- h2so4

observation w NaCl- NVC

observation w Na2Co3 - effervesnce

Question 7

Ba2+ test

Answer 7

reagent- h2so4

observation-white ppt

forms ba2so4

Question 8

so42- test

Answer 8

reagent - BaCl2

observation-white ppt

forms BaSo4

Question 9

mg2+ test

Answer 9

reagent - NaOH

observation- white ppt

Question 10

oh- test

Answer 10

reagent - mgcl2

observation - white ppt

froms mg(oh)2

Question 11

cl- test

Answer 11

reagents- AgNo3 (HNO3)

observation- white ppt

forms - Agcl