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chemical tests Flashcards

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1
Q

test for carbonate anion (CO32-)

A

add dilute acid
result: effervescence, CO2 produced

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2
Q

test for chloride anion in solution (Cl-)

A

acidify with dilute nitric acid, then add aqueous silver nitrate
result: white ppt.

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3
Q

test for bromide anion in solution (Br-)

A

acidify with dilute nitric acid, then add aqueous silver nitrate
result: cream ppt.

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4
Q

test for nitrate anion in solution (NO3-)

A

add aqueous sodium hydroxide, then aluminum foil; warm carefully
result: ammonia produced

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5
Q

test for sulfate anion in solution (SO42-)

A

acidify, then add aqueous barium nitrate
result: white ppt.

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6
Q

test for ammonium cation (NH4+)

A

effect of aqueous sodium hydroxide: ammonia produced on warming

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7
Q

test for calcium cation (Ca2+)

A

effect of aqueous sodium hydroxide: white ppt., insoluble in excess
effects of aqueous ammonia: no pt. or slightly white

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8
Q

test for copper(II) cation(Cu2+)

A

effect of aqueous sodium hydroxide: light blue ppt., insoluble in excess
effect of aqueous ammonia: light blue ppt., soluble in excess, giving dark blue solution

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9
Q

test for iron(II) cation (Fe2+)

A

effect of aqueous sodium hydroxide: green ppt., insoluble in excess
effect of aqueous ammonia: green ppt., insoluble in excess

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10
Q

test for iron (III) cation (Fe3+)

A

effect of aqueous sodium hydroxide: red-brown ppt., insoluble in excess
effect of aqueous ammonia: red-brown ppt., insoluble in excess

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11
Q

test for zinc cation (Zn2+)

A

effect of aqueous sodium hydroxide: white ppt., soluble in excess, giving colorless solution
effect of aqueous ammonia: white ppt., soluble in excess, giving colorless solution

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12
Q

test for ammonia gas (NH3)

A

turns damp red litmus paper blue

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13
Q

test for carbon dioxide gas (CO2)

A

turns limewater milky

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14
Q

test for chlorine gas (Cl2)

A

bleaches damp litmus paper

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15
Q

test for hydrogen gas (H2)

A

pops with lighted splint

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16
Q

test for oxygen gas (O2)

A

relights glowing splint

17
Q

flame test for lithium metal (Li+)

A

red

18
Q

flame test for sodium (Na+)

A

yellow

19
Q

flame test for potassium (K+)

A

lilac

20
Q

flame test for copper(II) (Cu2+)

A

blue-green

Chemistry (6 decks)

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