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IGCSE Chemistry > Sodium Hydroxide Tests for Cations > Flashcards

Sodium Hydroxide Tests for Cations Flashcards

1
Q

Colour of precipitate for copper (II) ion (Cu2+) reaction with sodium hydroxide (NaSO4)

A

Blue

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2
Q

Colour of precipitate for iron (II) ion (Fe2+) reaction with sodium hydroxide (NaSO4)

A

Green

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3
Q

Colour of precipitate for iron (III) ion (Fe3+) reaction with sodium hydroxide (NaSO4)

A

Reddish-brown

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4
Q

Process to test for ammonium ions (NH4+) using sodium hydroxide (NaSO4)

A
  1. Add sodium hydroxide to the substance in a test tube.
  2. Heat gently over a Bunsen burner with damp red litmus paper over the test tube.
  3. If ammonium is present, ammonia gas is given off and litmus paper turns blue.
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5
Q

Ionic equation for reaction using ammonium and sodium hydroxide

A

NH4+ + OH- —> NH3 + H2O

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IGCSE Chemistry (8 decks)

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