Qualitative analysis of simple inorganic salt - Preliminary Tests
1. Color test: Based on the observation of color of the salt, following inference is given.
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| 1. Color Test |
Bright / Bluish Green - Presence of Nickel or Copper salts
Yellow - Presence of Chromate salts
Pale Pink - Presence of Manganese salts
Colorless - Absence of Nickel, Copper, Chromate, Manganese salts
2. Flame test: A small amount of the salt is made into a paste with con. HCl in a watch glass. The paste is shown into a non-luminous flame.
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| 2a. Bluish green flame |
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| 2b. Pale green flame |
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| 2c. Brick red flame |
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| 2d. Crimson red flame |
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| 3. Action of heat |
Brown vapours - Presence of Nitrate
Violet vapours - Presence of Iodide
White sublimate on the sides of the test tube - Presence of Manganese salts
Yellow when hot, white when cold - Presence of Zinc
No characteristic change - Absence of Nitrate, Iodide, Manganese, Zince salts
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