chemistry a2

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Author:
ghoran
ID:
290334
Filename:
chemistry a2
Updated:
2014-12-01 07:32:18
Tags:
organic tests
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Description:
revision
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  1. C=C
    • bromine water 
    • positive result yellow/orange to colourless 
    • negative stays yellow
  2. primary and secondary alcohol
    • acidified potassium dichromate 
    • conc sulfuric acid (aq) 
    • conc K2Cr2O7 (aq) and heat 
    • positive orange solution to green solution 
    • negative stays orange
  3. aldehyde - t
    • tollens reagent made from NH3 (aq) and , NaOH(aq) , AgNO3 (aq) contains Ag(NH3)2+ needs warming 
    • positive is silver mirror 
    • negative no visible change 
  4. aldehyde - f
    • contains Cu2+ needs warming 
    • positive - blue solution to brick red precipitate 
    • negative solution stays blue
  5. carboxylic acid
    • sodium hydrogencarbonate 
    • NaHCO3 (S)
    • bubbles of gas fizzing effervescence positive
    • negative no visible change
  6. haloalkane
    • hydrolysis followed by acidified AgNO3 
    • warm with NaOH (aq) add AgNO3 (aq) 
    • RX + OH---> ROH + x- 
    • X- + Ag--> AgX (S) 
    • white precipitate for chloroalkane
    • cream precipitate for bromoalkane
    • yellow precipitate for iodoalkane  
    • negative no visible change
  7. acyl chloride - h
    • hydrolysis add water white fumes of HCl gas is positive 
    • no visible change is negative
  8. acyl chloride
    • reaction with silver nitrate 
    • add AgNO3 (aq) 
    • positive means white precipitate of AgCl vigorous reaction 
    • negative is no visible change

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