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Chemistry Practical > Identify Anions > Flashcards

Identify Anions Flashcards

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1
Q

Carbonate anion

A

Add a dilute acid

Effervescence is observed
Gas produced forms white precipitate with limewater
Gas is CO2

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2
Q

Nitrate anion

A

Add sodium hydroxide
Add aluminium foil
Warm the mixture
Effervescence is observed , A pungent gas produced turns moist red litmus paper blue , Gas is ammonia(NH3)

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3
Q

Sulfate anion

A

Add dilute nitric acid ,then aqueous barium nitrate or
Add dilute hydrochloric acid then add aqueous barium chloride

All lead to white precipitate of barium sulfate formed

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4
Q

Chloride and Iodide anion

A

Add dilute nitric acid , then add silver nitrate.
White precipitate of silver chloride
Or
Pale Yellow precipitate of silver iodide

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5
Q

Why is dilute nitric is added before barium nitrate and silver nitrate added?

A

To remove any carbonate or hydroxide ions which might form insoluble salts with the reagents added.

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Chemistry Practical (3 decks)

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