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Chemistry > Chemical Analysis > Flashcards

Chemical Analysis Flashcards

1
Q

What is the flame test got Lithium

A

Crimson red

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2
Q

What is the flame test for sodium

A

Yellow

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3
Q

What is the flame test for Pottasium

A

Lilac

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4
Q

What is the flame test for copper

A

Green

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5
Q

What is the flame test for Calcium

A

Brick red/ red orange

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6
Q

What can testing with sodium hydroxide be used to identify

A

Aluminium, Calcium, Magnesium, Copper II, Iron II, Iron III

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7
Q

When testing with sodium hydroxide, what substances produce a white precipitate

A

Aluminium, Calcium, Magnesium

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8
Q

What colour precipitate is produced when testing for Fe II with sodium hydroxide

A

Green

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9
Q

What colour precipitate is produced when testing for Fe III with sodium hydroxide

A

Brown

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10
Q

What colour precipitate is produced when testing for Cu II with sodium hydroxide

A

Blue

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11
Q

What is the test for Carbonate ions

A

Dilute acid added to said solution will cause fizzing during to co2 being produced, and can be confirmed by testing with limewater, which turns limewater cloudy

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12
Q

What is the test for sulfate ions

A

Dilute HCL followed by barium chloride solution being added to the solution being tested. If a white precipitate forms, the compound contains sulphate ions

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13
Q

Test for halide ions

A

Dilute nitric acid followed by silver nitrate solution is added to compound being tested.

Chloride - white precipitate
Bromide - Cream precipitate
Iodide - Yellow precipitate

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14
Q

Advantages of instrumental methods of analysis

A

More accurate
More sensitive
More rapid
Can be tested with small samples

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15
Q

Disadvantages of instrumental methods of analysis

A

Expensive
Complex (require training)
Comparison with known data is needed

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16
Q

Flame emission spectroscopy

A

Used to analyse metal ions in solutions
Light is passed through spectroscope when heated in a flame
Can measure concentration

17
Q

Explain a flame test

A

Nichrome wire loop, cleaned with hcl and dipped into sample is placed in roaring blue flame

18
Q

What tests are used to test for cations

A

Flame tests, Sodium hydroxide

19
Q

What tests are used for Anions

A

Limewater test, silver nitrate with nitric acid, barium chloride and hcl.

20
Q

Balanced equation for copper II sulphate and Copper II hydroxide

A

CuSO4 (aq) + 2NaOH (aq) -> Cu(OH)2 (s) + Na2SO4

All numbers subscript

21
Q

Ionic equation for copper (II) sulfate and copper (II) hydroxide

A

Cu2+ (aq) + 2OH- (aq) -> Cu(OH) 2 (S)

22
Q

Balanced equation for barium chloride and sodium sulphate

A

BaCl2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaCl (aq)

23
Q

Ionic equation for barium chloride and sodium sulfate

A

Ba 2+ (aq) + SO42- (aq) -> BaSO4 (s)

Chemistry (2 decks)

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