CHEMISTRY 3 All you need to remember...

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  • Created by: Gowshiee
  • Created on: 20-04-11 20:14

1. Water water everywhere

Analytical chemists: check the purity of the water.

Two types of analysis:

  • Qualitative
  • Quantitive 

    Qualitative: Tests the kind of chemical present
    Quantitative: Tests the amount of chemical present 

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2. Testing for ions

FLAME TESTS:

CALCIUM: BRICK RED

SODIUM: YELLOW

POTASSIUM: LILAC

COPPER: GREEN

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4. Detecting acids

HOW TO TEST FOR ACID SOLUTIONS (to check for H+ ions)

LITMUS PAPER: Turns red

UNIVERSAL INDICATOR: Turns red

SPLINT : Goes pop

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3.Looking for cations

Precipitation reaction: Add few drops of sodium hydroxide to the unknown solution.

Aluminium:  White precipitate  [With excess- would dissolve]

Calcium: White precipitate  [With excess-would not dissolve]

        [Since these two tests are similiar add excess of Sodium Hydroxide] 

Copper: Blue 

Iron (II):  Green

Iron (III):  Brown

Ammonium: None

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