How to test for chloride ion?
The question is i know the test that we can use to test for the iron (III) ions but i dunno about the tests for chloride ions that are formed in the chlorine water..anyone pls help me.it's urgent
Answer:
You can test for chloride ions by adding a few drops of dilute nitric acid followed by a few drops of silver nitrate solution. If chloride ions are present you will see a white precipitate of silver chloride. However, chlorine water itself will contain chloride ions as chlorine in aqueous solution disproportionates to form chloride and chlorate(I) ions.
Cl2 + H2O --> Cl- + ClO- + 2H+
so you will get a positive test for chloride even in the absence of iron(II) sulphate!
Silver nitrate, if memory serves, will precipitate Cl ions.
Add in silver nitrate. It forms silver chloride which is insoluble.
Actually, you can test it with silver nitrate (where silver chloride, a white solid will precipitate), as said in the previous questions. You can test it with other insoluble metal ions actually, but well, its more preferred to use silver ions... since the halide is limited only to chloride, I think that would suffice.
Hope that helped.
There are 2 methods:
1. On adding silver nitrate, you'll get a white precipitate insoluble in ammonium hydroxide.
2. Chromyl chloride test:
Heat 0.1 gm of the substance with 0.1 gm of Potassium Chromate and 1 ml of Conc.H2SO4.Pass the red vapour of Chromyl Chloride i.e. the gas released into a little NaOH.Use a U-tube for this. NaOH turns to a yellow solution. Now add acetic acid and lead acetate.
RESULT: Yellow precipitate appears.
it is very easy dear
you can use silver nitrate you will get silver chloride and you can see the silver chloride because it is a white precipitate
(BUT BE CARE FULL BECAUSE SILVER NITRATE WILL MAKE A BLACK SPOT ON YOUR SKIN IF IT CONTACT WITH IT)
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