Chemistry Paper 2 > Flame Tests > Flashcards

Flame Tests Flashcards

(9 cards)

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1
Q

Lithium test colour

A

Crimson

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2
Q

Potassium

A

Lilac

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3
Q

Na

A

Yellow/ orange

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4
Q

Ca

A

Brick red

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5
Q

Cu

A

Green

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6
Q

Alkenes burnt in air

A
  • smoky flame
    = produces unburnt carbon particles
    = from incomplete combustion
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7
Q

What do you need for hydrogenation

A
  • 150C
  • nickel catalyst
  • reacting an alkene with hydrogen produces an alkane
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8
Q

Describe hydration

A
  • creates an alcohol
  • water must be steam
  • need 300C
  • pressure around 70 atmospheres
  • phosphoric acid as a catalyst
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9
Q

Why is it hard to distinguish metal ions from colour of flame

A

Flame colours may mix

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Chemistry Paper 2
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