[C.8] Acid, bases and salts Flashcards

1
Q

Gas test for ammonia

A

turns damp red litmus paper blue

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2
Q

Gas test for carbon dioxide

A

turns limewater milky

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3
Q

Gas test for chlorine

A

bleaches damp litmus paper

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4
Q

Gas test for hydrogen

A

‘pops’ with a lighted splint

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5
Q

Gas test for oxygen

A

relights a glowing splint

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6
Q

Flame test for lithium

A

Red

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7
Q

Flame test for sodium

A

Yellow

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8
Q

Flame test for potassium

A

Lilac

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9
Q

Flame test for copper (II)

A

Blue - green

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10
Q

Test for anion carbonate

A

Test: add dilute acid
Result: Effervescence, carbon dioxide produced

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11
Q

Test for anion chloride

A

Test: Acidify with dilute nitrate acid & add aqueous silver nitrate
Result: White ppt.

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12
Q

Test for anion bromide

A

Test: Acidify with dilute nitric acid & add aqueous silver nitrate
Result: Cream ppt.

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13
Q

Test for anion nitrate

A

Test: add aqueous sodium hydroxide then aluminium foil
Result: Ammonia produced

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14
Q

Test for anion sulfate

A

Test: Acidify & add aqueous barium nitrate
Result: white ppt.

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15
Q

give 3 properties of bases

A
  • slippery in touch.
  • bitter in taste.
  • pH above 7.
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16
Q

give 3 properties of acids

A
  • sour taste (when edible)
  • are corrosive
  • pH below 7.
17
Q

Cation - Test for Calcium

A

Effect of NaOH⁽ᵃᑫ⁾ : White ppt insoluble in excess
Effect of NH3 ⁽ᵃᑫ⁾: no ppt or very slight white ppt

18
Q

Cation - Test for Ammonium

A

Effect of NaOH⁽ᵃᑫ⁾: Ammonia

19
Q

Cation - Test for Copper (II)

A

Effect of NaOH⁽ᵃᑫ⁾: Light blue ppt insoluble in excess
Effect of NH3 ⁽ᵃᑫ⁾: Light blue ppt soluble in excess giving a dark blue solution

20
Q

Cation - Test for iron (II)

A

Effect of NaOH⁽ᵃᑫ⁾: green ppt insoluble in excess
Effect of NH3 ⁽ᵃᑫ⁾: green ppt insoluble in excess

21
Q

Cation - Test for iron (III)

A

Effect of NaOH⁽ᵃᑫ⁾: Red-Brown ppt insoluble in excess
Effect of NH3 ⁽ᵃᑫ⁾: red-brown ppt insoluble in excess

22
Q

Cation - Test for Zinc

A

Effect of NaOH⁽ᵃᑫ⁾: white ppt soluble in excess giving a colourless solution
Effect of NH3 ⁽ᵃᑫ⁾: white ppt, soluble in excess giving a colourless solution

22
Q

Cation - Test for Zinc

A

Effect of NaOH⁽ᵃᑫ⁾: white ppt soluble in excess giving a colourless solution
Effect of NH3 ⁽ᵃᑫ⁾: white ppt, soluble in excess giving a colourless solution