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Test
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Play Movie
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Observations
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| 1)
Put a portion of sample of R into a boiling tube and
warm gently. |
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1)
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2a)
To a portion of R, add dilute hydrochloric acid until
a change is seen
b) Add excess hydrochloric acid to the the mixture from (a).
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2a)
2b)
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3) To a portion of R, add an equal volume of aqueous
barium nitrate. Divide the mixture into two parts.
a) Note the appearance of the first part after a few minutes.
b) To the second part add dilute nitric acid.
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3a)
3b)
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4a)
To a portion of R, add an equal volume of water and
then aqueous silver nitrate.
4b) add dilute nitric acid to the mixture from (a).
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4a)
4b)
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5a) To a portion of R, add an equal volume of aqueous
potassium iodide.
5b) Add dilute hydrochloric acid to the mixture from (a)
until it is just acidic. Allow it to stand for a few minutes.
5c) Add aqueous sodium thiosulphate to the mixture from
(b).
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5a)
5b)
5c)
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