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Chemistry > Qualatative Analysis > Flashcards

Qualatative Analysis Flashcards

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1
Q

Test for water

A

Anhydrous Copper sulfate: white-blue

Anhydrous cobalt chloride: blue-pink

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2
Q

Test for CO2

A

Limewater from colourless to milky white

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3
Q

H2

A

Lit splint burns with a squeaky pop

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4
Q

O2

A

Glowing splint relights

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5
Q

NH3

A

Glass rod dipped in conc.HCl solution

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6
Q

HCl

A

Glass rod dipped in conc. NH3 solution

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7
Q

Cl2

A

Bleaches damp litmus paper

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8
Q

Lithium ion

A

Crimson flame

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9
Q

Sodium ion

A

Yellow flame

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10
Q

Potassium ion

A

Lilac flame (pink through cobalt glass)

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11
Q

Calcium ion

A

Brick red flame

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12
Q

Barium ion

A

Apple green flame

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13
Q

Copper ion

A

Blue-green flame

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14
Q

Test for NH4

A

Add to test tube with 4-5cm dilute NaOH. Warm mixture gently abs test with damp universal indicator.
Universal indicator turns blue, pungent smell.
Expose to glass rod with conc.HCl solution. White smoke appears

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15
Q

Test for halide ions

A

Dissolve spatula measure in water and shake to mix.

Add dilute nitric acid and a few drops of AgNO3 solution

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16
Q

Chloride ion

A

White ppt forms

Soluble in both conc and dilute ammonia

17
Q

Bromide ion

A

Cream ppt forms

Soluble in conc ammonia and insoluble in dilute

18
Q

Iodide ion

A

Yellow ppt forms

Insoluble in both conc and dilute ammonia solutions

19
Q

Sulfate ions

A

Dissolve in 2-3cm of water.
Add dilute nitric acid and 3-4 drops of BaCl solution. Shake to mix.

White ppt forms

20
Q

Carbonate ions

A

Dissolve in water. Add 1cm dilute nitric acid and collect any gas evolved with a pipette.
Bubble gas through limewater.
Colourless to milky white

21
Q

Phenolphthalein

A

Weak acid strong base

Pink alkali, colourless acid

22
Q

Methyl orange

A

Strong acid weak base

Red acid, yellow alkali

Chemistry (11 decks)

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