You are provided with 2 salts L and M. Investigate and identify the salts from the following tests.

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Lara Dudley        Inorganic Observation Exercise – I _        Spring 2002

Inorganic Observation Exercise - I

Candidate:                 Lara Jane Dudley

Candidate No:        5007

You are provided with 2 salts L and M.  Investigate and identify the salts from the following tests.


Qualitative Investigation

Introduction

You are provided with 2 salts L and M.  Investigate and identify the salts from the following tests.

1.        Observe the appearance of the two salts.


2.        Make a solution of about half of your sample of L in 10 cm³ of distilled water and test 2 cm³ portions as follows:

(a)        Add aqueous sodium hydroxide until no further change is apparent.  Warm the mixture gently and test the gas evolved.

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(b)        Add an equal volume of dilute sulphuric acid followed by a few drops of aqueous potassium manganate (VII).  Leave the mixture to stand.


(c)        Add 1 cm³ of dilute nitric acid followed by 10 drops of aqueous silver nitrate.

(d)        Add 1 cm³ of dilute hydrochloric acid followed by 10 drops of aqueous barium chloride solution.

3.        Make a solution of about half your sample of M in distilled water and test 2 cm³ portions as follows:

(a)        Add aqueous sodium hydroxide until no further change is apparent.  Warm the mixture gently.

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