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GCSE CHEMISTRY > C17 Chemical analysis > Flashcards

C17 Chemical analysis Flashcards

1
Q

What is a pure substance?

A

Something made up out of only one type or substance or atom

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2
Q

What is the difference between melting and boiling points of a pure and impure substance?

A

Pure- one specific temp

Impure- Occurs across a range of temperatures

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3
Q

What is a formulation?

A

A mixture designed or a specific purpose

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4
Q

What is chromatography?

A

A process for separating coloured mixtures

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5
Q

What is the test for hydrogen?

A

A lit splint gives a squeaky pop

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6
Q

What is the test for oxygen?

A

Re-lights a glowing splint

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7
Q

What is the test for carbon dioxide?

A

Turns limewater milky if bubbled through it

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8
Q

What is the test for chlorine?

A

Bleaches damp litmus paper

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9
Q

What is the test for aluminium, calcium and magnesium ions?

A

Forms white precipitate with sodium hydroxide solution

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10
Q

How can aluminium ions be distinguished from magnesium and calcium ones?

(sodium hydroxide solution)

A

The white precipitate will dissolve with excess sodium hydroxide solution

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11
Q

What colour precipitates are formed when sodium hydroxide solution is added to copper II, iron II and iron III ions?

A

copper II - blue precipitate

iron II - green precipitate

iron III - brown precipitate

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12
Q

What is the test for a halide ion?

A

add silver nitrate and nitric acid

chlorine forms white precipitate

bromide forms cream precipitate

iodide forms yellow precipitate

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13
Q

What is the test for a carbonate ion?

A

Carbon dioxide gas formed on addition of acid

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14
Q

What is the test for a sulfate ion?

A

White precipitate formed with hydrochloric acid and barium chloride

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15
Q

What colour does flame test with Lithium produce?

A

CRIMSON

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16
Q

What colour does flame test with Sodium produce?

A

YELLOW

17
Q

What colour does flame test with Potassium produce?

A

LILAC

18
Q

What colour does flame test with Calcium produce?

A

Orange-red

19
Q

What colour does flame test with Copper produce?

A

GREEN

20
Q

What is instrumental analysis?

A

using complex scientific equipment to identify substances

21
Q

What are the three advantages of instrumental analysis?

A

rapid
accurate
sensetive

22
Q

What information does flame emission spectroscopy produce?

A

The wavelength of light given off by a metal in a flame to identify the metal and its concentration

GCSE CHEMISTRY (20 decks)

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