5 QUALITATIVE ANALYSIS (QA)

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

What salts Colour of solid : white Colour of aqueous salt solution : colourless

Back (Answer)

Smart People Constantly Make Amazing Zebra Art Sodium potassium calcium magnesium aluminium zinc ammonia

Front (Question)

What salts Colour of solid : blue Colour of aqueous salt solution : blue

Back (Answer)

• CuSO₄: Copper(II) sulfate • Cu(NO₃)₂: Copper(II) nitrate

Front (Question)

What salts Colour of solid : greeen Colour of aqueous salt solution :blue

Back (Answer)

CuCl₂: Copper(II) chloride

Front (Question)

What salts Colour of solid : green Colour of aqueous salt solution ; insoluble

Back (Answer)

CuCO₃: Copper(II) carbonate

Front (Question)

What salts Colour of solid : green Colour of aqueous salt solution : green

Back (Answer)

FeSO4, Fe(NO3)2, FeCl2 Iron sulfate Iron nitrate Iron chloride

Front (Question)

What salts Colour of solid : brown Colour of aqueous salt solution : yellow

Back (Answer)

Fe₂(SO₄)₃ (iron(III) sulfate), Fe(NO₃)₃ (iron(III) nitrate), FeCl₃ (iron(III) chloride).

Front (Question)

What salts Colour of solid : brown when hot and yellow when cold Colour of aqueous salt solution : insoluble

Back (Answer)

• PbO: Lead(II) oxide

Front (Question)

What salts Colour of solid : black Colour of aqueous salt solution : insoluble

Back (Answer)

• CuO: Copper(II) oxide

Front (Question)

What salts Colour of solid : yellow when hot and white when cold Colour of aqueous salt solution : insoluble

Back (Answer)

• ZnO: Zinc oxide

#10

Front (Question)

What salts Colour of solid : white Colour of aqueous salt solution : insoluble in cold water but soluble in hot water to give a colour less solution

Back (Answer)

• PbCl₂: Lead(II) chloride

#11

Front (Question)

What salts Colour of solid : yellow Colour of aqueous salt solution : insoluble in cold water but soluble in hor water to give a colour less solution

Back (Answer)

• PbI₂: Lead(II) iodide

#12

Front (Question)

All metal hydroxides, except for which grp hydroxides, are insoluble?

Back (Answer)

grp 1

#13

Front (Question)

how to test for cations Ca2+, Zn2+, Al3+, Pb2+, Fe2+, Fe3+,Cu2+ , NH4

Back (Answer)

Reagent (NaOH(aq) / NH3(aq)) must be added drop-wise, then in excess. If precipitate forms, the colour of precipitate must be noted and the solubility of precipitate in excess alkali must be checked.

#14

Front (Question)

Ca2+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise: white ppt formed excess: white ppt insoluble in excess

#15

Front (Question)

Zn2+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise:white ppt formed excess:white ppt soluble to give colourless solution

#16

Front (Question)

Al3+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise:white ppt formed excess:white ppt soluble to give colourless solution

#17

Front (Question)

Pb2+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise:white ppt formed excess:white ppt soluble to give colourless solution

#18

Front (Question)

Fe3+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise:reddish-brown ppt formed excess:reddish-brown ppt insoluble in excess

#19

Front (Question)

Fe2+-> NaOH(aq) tests reactions

Back (Answer)

dropwise:green ppt formed excess:green ppt insoluble in excess

#20

Front (Question)

Cu2+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise:blue ppt formed excess:blue ppt insoluble in excess

#21

Front (Question)

NH4+ -> NaOH(aq) tests reactions

Back (Answer)

dropwise: no ppt formed excess: NA UPON HEATING: Colourless and pungent gas was evolved which turned the damp red litmus paper blue. Gas evolved is NH3(g). (difference between this and NO3- is no aluminium foil)

#22

Front (Question)

cation NaOH memory tech

Back (Answer)

dropwise: first 4 is white ppt formed, then rgb and no ppt excess. first insoluble, next 3 white soluble to colourless(ZAP), rest insoluble

#23

Front (Question)

Ca2+-> NH3(aq) tests reactions

Back (Answer)

dropwise: no ppt formed excess: NA

#24

Front (Question)

Zn2+-> NH3(aq) tests reactions

Back (Answer)

dropwise:white ppt formed excess:white ppt soluble to give colourless solution