Test for Lead Nitrate

  1. Preliminary Test 1: colour

    1. white

  2. Preliminary Test 2: odour

    1. nothing really

  3. Preliminary Test 3: Dry Heating

    1. make test-tube dry

    2. use spatula to put a little bit of salt JUST A LITTLE BIT in a test tube

    3. hold test tube with test tube holder

    4. hold it over BLUE flame

    5. you get brown fumes

  4. Test for Group II anion

    1. salt + CONCENTRATED H2SO4

    2. heat it on blue flame

    3. observation: reddish-brown gas evolved

  5. Confirmatory test for NO3-

    1. salt + CONCENTRATED H2SO4 again (please add enough, otherwise it won’t work)

    2. this time add copper turnings

    3. heat it on blue flame, for a while

    4. observation: reddish-brown gas evolved

    5. also, solution turns bluish green or blue idek THIS WILL NOT HAPPEN IF YOU DON’T ADD ENOUGH ACID SO ADD ENOUGH

  6. Test for Group 0 cation

    1. salt solution

    2. NaOH

    3. heat it

    4. observation: it starts effervescence so it is NOT ammonium

  7. Test for group 1 cation

    1. salt solution

    2. add DILUTED HCl

    3. obseration: white precipitate (so probably lead)

  8. Confirmatory test for Pb2+

    1. salt solution

    2. add KI (potassium iodide)

    3. observation: yellow precipitate formed