Ion Identification Flashcards by Aliza Zafar

Q

Lithium flame test colour?

A

Red

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Q

Sodium colour flame?

A

Yellow

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Q

Potassium flame colour?

A

Lilac

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Q

Rubidium flame colour?

A

Red

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Q

Caesium flame colour?

A

Blue-violet

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Q

Beryllium flame colour?

A

No colour

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Q

Magnesium flame colour?

A

Bright white

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Q

Calcium flame colour?

A

Brick red

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Q

Strontium flame colour ?

A

Crimson

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Q

Barium flame colour?

A

Apple green

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Q

Ammonium test? +what occurs

A

Add warm NaOH
Smells and damp litmus goes blue

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Q

Chlorine bromine and iodine test?

A

Add HNO3
Add nitric acid to remove carbonate ions, add
Add AgNO3

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Q

Chloride ions precipitate colour?

A

White precipitate

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Q

Bromine ions precipitate colour?

A

Cream precipitate

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Q

Iodide ions precipitate colour?

A

Yellow precipitate

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Q

Chlorine in dilute ammonia?

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A

Soluble

Q

Chlorine in concentrated ammonia?

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A

Soluble

Q

Bromide in dilute ammonia?

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A

Slightly soluble

Q

Bromide in concentrated ammonia?

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A

Soluble

Q

Iodide in dilute ammonia?

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A

Insoluble

Q

Iodide in concentrated ammonia?

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A

Insoluble

Q

Test for sulfate ion? Precipitate colour?

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A

Add barium hydroxide (any barium compound)
White precipitate

Q

OH- test? And colour change

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A

Add ammonia and bleached danp red litmus blue