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RGS 5th Form Chemistry > 3 Salt Tests > Flashcards

3 Salt Tests Flashcards

1
Q
  1. Flame test - lilac flame
  2. Nitric acid, no fizzing
  3. silver nitrate- cream precipitate

What salt was tested?

A

potassium bromide

KBr

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2
Q

What is the ionic equation for the silver nitrate and Cl- ion?

A

Ag+ + Cl- ⇒ AgCl

white precipitate

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3
Q

NaOH was added- dirty green precipitate formed

What ion is present?

A

Fe2+

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4
Q

What colour is Ca2+ in a flame test?

A

red/orange

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5
Q

What is the chemical test for Cl-, Br- and I- ions?

A

Add nitric acid

if no fizzing, add silver nitrate

white, cream and yellow precipitate shows presence of Cl-, Br- and I- ions respectively

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6
Q
  1. Flame test - red flame
  2. Nitric acid, no fizzing
  3. silver nitrate- yellow precipitate

What salt was tested?

A

lithium iodide

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7
Q

hydrochloric acid was added- no fizzing

barium chloride was added- white precipitate formed

What ion is present?

A

sulphate ion

SO42-

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8
Q

What is the ionic equation for the hydrochloric acid test on carbonate ion?

A

2H+ + CO32- ⇒ H2O + CO2

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9
Q

What is the ionic equation for the silver nitrate and Br- ion?

A

Ag+ + Br- ⇒ AgBr

cream precipitate

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10
Q
  1. Flame test - lilac flame
  2. Nitric acid, no fizzing
  3. silver nitrate- cream precipitate

What salt was tested?

A

potassium bromide

KBr

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11
Q
  1. Flame test - yellow flame
  2. HCl added, no fizzing
  3. BaCl2 added- white precipitate

What salt was tested?

A

Na2SO4

sodium sulphate

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12
Q

What is the ionic equation for the NaOH test on Fe2+ ions?

A

Fe2+ + 2 OH- ⇒ Fe(OH)2

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13
Q

What colour is Li+ in a flame test?

A

red

Crimson red

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14
Q

What is the chemical test for CO32-ion?

A

Add hydrochloric acid

fizzing shows carbonate ion is present

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15
Q

What is the ionic equation for the silver nitrate and I- ion?

A

Ag+ + I- ⇒ AgI

yellow precipitate

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16
Q
  1. NaOH added- dirty green precipitate
  2. hydrochloric acid added- no fizzing
  3. Barium chloride added- white precipitate

What salt was tested?

A

FeSO4

iron (II) sulphate

17
Q
  1. NaOH added- blue precipitate
  2. hydrochloric acid added- no fizzing
  3. Barium chloride added- white precipitate

What salt was tested?

A

CuSO4

copper (II) sulphate

18
Q

What colour is K+ in a flame test

19
Q

What is the ionic equation for the NaOH test on NH4+ ions?

A

NH4+ + OH- ⇒ NH3 + H2O

ammonia gas formed

damp red litmus turns blue

20
Q

What colour is Na+ in a flame test

21
Q

Describe how you test for the following cations

Na+, K+. Li+ and Ca2+

A

Flame test

  • Dip platinum wire into dilute HCl*
  • Dip wire into salt*
  • run end of wire up and down edge of roaring flame*

Observe colour

22
Q
  1. NaOH added- brown precipitate
  2. hydrochloric acid added- fizzing

What salt was tested?

A

Fe2(CO3)3

iron (III) carbonate

23
Q

What is the chemical test for SO42-ion?

A

Add hydrochloric acid

If no fizzing, add barium chloride solution

white precipitate shows sulphate ion is present

24
Q
  1. NaOH added- dirty green precipitate
  2. hydrochloric acid added- no fizzing
  3. Barium chloride added- white precipitate

What salt was tested?

A

FeSO4

iron (II) sulphate

25
Q
  1. Flame test - red/orange flame
  2. Nitric acid, no fizzing
  3. silver nitrate- white precipitate

What salt was tested?

A

calcium chloride

CaCl2

26
Q

What is the test for NH4+ ion?

A

Add NaOH

if no precipitate formed, hang damp red litmus paper over edge of test tube

NH3 produced turns litmus paper blue

NH4+ + OH- ⇒ NH3 + H2O

27
Q

NaOH was added- blue precipitate formed

What ion is present?

28
Q

What is the ionic equation for the NaOH test on Cu2+ ions?

A

Cu2+ + OH- ⇒ Cu(OH)<span>2</span>

<span>Blue precipitate</span>

29
Q

What is the ionic equation for the NaOH test on Fe3+ ions?

A

Fe3+ + 3 OH- ⇒ Fe(OH)3

brown precipitate

30
Q

What is the test for Fe2+, Fe3+ and Cu2+ ions?

A
  • dissolve the salt you are testing in water
  • add sodium hydroxide (NaOH)
  • observe colour of metal hydroxide precipitate
31
Q
  1. Flame test - red/orange flame
  2. Nitric acid, no fizzing
  3. silver nitrate- white precipitate

What salt was tested?

A

calcium chloride

CaCl2

32
Q

NaOH was added- brown precipitate formed

What ion is present?

33
Q

What is the ionic equation for the barium chloride test on sulphate ion?

A

Ba2+ + SO42- ⇒ BaSO4

RGS 5th Form Chemistry (9 decks)

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