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Flashcards in Identifying Ions Deck (10)
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1

Carbonate

CO3-

Add HCl and pass the released gas through limewater to form a cloudy white precipitate

2

Chloride

Cl-

If you add silver nitrate solution, forms white precipitate

If you add nitric acid, forms insoluble precipitate but then after adding NH4OH, the precipitate dissolves

3

Hydroxide

OH-

This ion turns red litmus paper blue

4

Sulfate Ion

(SO4)2-

Forms a white precipitate with BaCl2 and this precipitate is insoluble in HCl

5

Sulfide

S2-

Add HCl and test the gas released with lead acetate paper. The rotten-egg-smelling gas turns the paper brown-black.

6

Ammonium

NH4+

After adding strong base and gently heating, smells like ammonia.

7

Ferrous or Iron (II)

If you add potassium ferrocyanide (K3Fe(CN)6), a dark blue (Turnball's blue) precipitate forms

8

Ferric (Iron (III))

Fe3+

Forms a Prussian blue (dark blue) precipitate with potassium ferrocyanide

9

Hydrogen

H+

Turns blue litmus paper red

10

Acetate

C2H3O2-

If you add concentrated H2SO4 and heat gently, smells like vinegar