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IGCSE umaima > Chemistry ATP > Flashcards

Chemistry ATP Flashcards

1
Q

describe the test for nitrate ions

A

add aqueous sodium hydroxide
• then (reduction with) aluminium (foil) (and warm)
• (ammonia gas produced which) turns damp red litmus blue

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2
Q

adding excess ammonia to copper (ii) sulphate

A

blue ppt dissolves into dark blue solution

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3
Q

aluminum and NAOH

A

white ppt, dissolves in excess to form a colorless solution

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4
Q

aluminum and NH3

A

white ppt, insoluble in excess

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5
Q

ammonium and NAOH

A

ammonia gas produced if warmed

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6
Q

calcium NAOH

A

white ppt insoluble in excess

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7
Q

calcium and NH3

A

faintly visible white ppt

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8
Q

chromium3+ and NAOH

A

green ppt green solution in excess

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9
Q

chromium and NH#

A

grey green ppt insoluble in excess

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10
Q

iron II and naoh and nh3

A

green ppt insoluble in excess

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11
Q

iron III naoh and nh3

A

red brown ppt insoluble in excess

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12
Q

zinc with both reagents

A

white ppt dissolves in excess to form colorless solution

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13
Q

li

A

red

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14
Q

na

A

yellow

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15
Q

k

A

lilac

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16
Q

Ca

A

orange red

17
Q

cu

A

blue green

18
Q

test for chloride, bromide, iodide

A

add nitric acid and add aqueous silver nitrate

  • white ppt
  • cream ppt
  • yellow ppt
19
Q

test for nitrate NO3 2-

A

add aqueous NAOH and aluminium foil, warm gently, gas released is ammonia

20
Q

sulfates

A

acidify with nitric acid, add aqueous barium nitrate, white ppt forms

21
Q

sulfite SO3 2-

A

add acid , test the gas released. decoulorizes acidified potassium maganate solution so2 gas released

IGCSE umaima (9 decks)

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