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CHEM > Methods > Flashcards

Methods Flashcards

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1
Q

Flame Tests

Lithium

A

RED

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2
Q

Flame Tests

Sodium

A

ORANGE

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3
Q

Flame Tests

Potassium

A

LILAC

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4
Q

Flame Tests

Calcium

A

BRICK RED

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5
Q

Testing for NH4+

A

Add Sodium hydroxide

Warm

Add damp red litmus paper

Paper should turn blue

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6
Q

Testing for Cu2+ / Fe2+ / Fe3+

A

Add sodium hydroxide

Cu - Blue precipitate
Fe2+ - Green precipitate
Fe3+ - Brown precipitate

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7
Q

Testing for Cl Br and I

A

Add nitric acid unless the solution is already acidic

Add silver nitrate

Cl - white precipitate
Br - cream precipitate
I - yellow precipitate

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8
Q

Testing for carbonates

A

Add HCl

CO2 is produced which can be tested using lime water

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9
Q

Testing for sulphates

A

add dilute hydrochloric acid

add barium chloride

A white precipitate forms

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CHEM (8 decks)

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