Exp. 6 - Ammonium Sulfide group Flashcards by mi rodriguez

Q

Al 3+ and excess NH4OH

A

insoluble

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Q

Al(OH )3

A

white gelatinous ppt

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Q

Al and excess NaOH

A

colorless solution

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Q

Al and Na2O2

= Na3AlO

A

Colorless solution

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Q

Al4[Fe(CN)6]3

A

white ppt

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Q

Cr(OH )3

A

grayish green

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Q

Cr in excess ammonium hydroxide

A

insoluble

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Q

NaCr02; Cr 3+ in excess NaOH

A

green solution

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Q

Na2CrO4

A

yellow solution

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Q

Cr4[Fe(CN)6]3

A

grayish green ppt

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Q

Zn(OH)2

A

white ppt

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Q

Zn ans excess NH4OH

A

Zn(NH3)4 2+

colorless solution

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Q

ZnS

A

white ppt

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Q

Na2ZnO2

A

colorless solution

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Q

Zn in Na2O2

A

no ppt

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Q

Zn2Fe(CN)6

A

white ppt

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Q

Zn3[Fe(CN)6]2

A

yellowish white ppt

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Q

Fe(OH)2

A

white-green-brown ppt.

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Q

Fe 2+ in NH4OH

A

Fe(OH)2

insoluble

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Q

FeS

A

black ppt

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Q

fe 2+ in dilute HCL ; HNO3

A

soluble

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Q

Fe 2+ in NaOH

A

Fe(OH)2

white-green-reddish brown ppt

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Q

Fe 2+ in excess NaOH

A

insoluble

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Q

Fe(OH)3 from Na2O2

A

reddsih brown ppt

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F2Fe(CN)6

white to blue ppt

Fe3[Fe(CN)6]2

turnbull's blue ppt

K3Co(NO2)6

yellow crystalline ppt

Fe(OH)3

reddish brown ppt

Fe2S3

black ppt

Fe 3+ and Na2O2

not affected

Fe4[Fe(CN)6]3

prussian blue ppt

Fe 3+ in H2C2O4

soluble

Fe(CN)3

brown solution

Fe(SCN) 2+

blood red solution

Fe 3+ in acetate and KNO2

no ppt.

Co(OH)NO3

blue basic salt

Co(NH3)4 2+

dirty yellow solution (turns red)

CoS

black ppt

Co(OH)3 to Co(OH)2

blue to pink ppt

Co(OH)3 oxidized

black ppt

Co2Fe(CN)6

green ppt

Co3Fe(CN)6

reddish brown ppt

Co(SCN)4 2-

deep blue solution

Ni(OH)NO3

green basic salt

Ni(NH3)4

blue solution

NiS

black ppt

Ni(OH)2

green apple ppt

Ni2Fe(CN)6

greenish white ppt

Mn(OH)2 to MnO •H2O

white to light brown ppt

MnS

flesh to brown ppt

Mn(OH)2 to Mno • H2O

white ppt to light brown ppt

MnO2 • H2O from Na2O2

dark brown ppt

Mn2Fe(CN)6

pinkish white ppt

Cr3[Fe(CN)6]2

light brown ppt

not affected by Na2O2

Fe 3+ , Ni 2+

Soluble in Na2O2

Al 3+, Cr 3+ , Zn 2+

Zn in excess NH4OH

soluble | colorless solution

Co in excess NH4OH

soluble | dirty yellow solution

Ni in excess NH4OH

soluble | blue solution

No ppt or soluble in NH4Cl & NH4OH

Zn 2+ ,Fe 2+ , Co 2+ | ,Ni 2+ , Mn 2+

Fe 2+ in NH4SCN

no reaction

Al 3+ & NH4OH = Al(OH)3

white gelatinous ppt.