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analytical chemistry Flashcards

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1
Q

name the colored cations

A

Fe2+, Fe3+, Cu2+

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2
Q

what is the color of Fe2+ (ferrous)

A

GREEN

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3
Q

what is the color of Fe3+ (ferric)

A

YELLOW

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4
Q

what is the color of Cu2+ (cuprous )

A

BLUE

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5
Q

name the 2 colored anions

A

MnO4 1- (pink), Cr2O7 2-(orange)

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6
Q

what is the color of permanganate ion

A

pink/purple

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7
Q

what is the color of dichromate ion

A

orange

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8
Q

what color is FeSo4

A

green

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9
Q

what color is FeCl3

A

yellow

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10
Q

what color is Zn(NO3)2

A

colorless

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11
Q

what color is Pb(NO3)2

A

colorless

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12
Q

what color is CuSO4

A

BLUE

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13
Q

what color is Ca(NO3)2

A

colorless

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14
Q

what happens when FeSO4 reacts with NaOH/NH4OH

A

–> dirty green color precipitate of Fe(OH)2

–> insoluble precipitate

–> insoluble even when reacting with excess NaOH

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15
Q

what happens when FeCl3 reacts with NaOH/NH4OH

A

–> reddish-brown color precipitate of Fe(OH)3

–> remains insoluble when reacting with excess NaOH

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16
Q

what happens when Zn(NO3)2 reacts with NaOH/NH4OH

A

–> dirty gelatinous white color precipitate is formed

–> reacts with an excess of NaOH/NH4OH to form a soluble clear solution

17
Q

what happens when Pb(NO3)2 reacts with NaOH/NH4OH

A

–> chalky white precipitate of Pb(OH)2 is formed

–> reacts with an excess of NaOH to produce a soluble clear solution

18
Q

what happens when CuSO4 reacts with NaOH/NH4OH

A

–> pale blue color precipitate of Cu(OH)2is formed

–> reacts with an excess of NH4OH to form a soluble deep inky blue solution

19
Q

what happens when Ca(NO3)2 reacts with NaOH

A

–> white color precipitate of Ca(OH)2 is formed which is sparingly soluble

–> reacts with an excess of NaOH to become insoluble

–> does not react with NH4OH

chemistry (14 decks)

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