Halide Ions With Sulfuric Acid Flashcards by Mashia Akanji

Q

Oxidation state of sulfur in NaHSO4

A

+6

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Q

Oxidation state of sulfur in SO2

A

+4

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Q

Oxidation state of sulfur in

s

A

0

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Q

Oxidation state of sulfur in H2S

A

-2

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Q

HCl produces

A

White misty fumes

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Q

Br2

A

Orange vapour

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Q

S

A

Yellow solid

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Q

H2S

A

Rotten egg smell

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Q

Cl- reacts with

A

NaHSO4

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Q

Br- reacts with

A

NaHSO4 SO2

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Q

I- reacts with

A

NaHSO4, SO2, S, H2S

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Q

Test for halides using silver nitrate

A

Add dilute Nitric acid and then silver nitrate solution.

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Q

White precipitate

A

Chloride ions (silver chloride)

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Q

Cream preciptate

A

Bromide ions (silver bromide)

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Q

Yellow precipitate

A

Iodide ions ( silver iodide)

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Q

We add nitric acid to….

A

React with any anions other than halides

This could give a false positive

Q

Further tests after silver nitrate

A

Add amonia

Q

Cl-

A

white precipitate dissolves in

dilute NH3

Q

Br-

A

cream precipitate dissolves in

concentrated NH3

Q

I-

A

yellow precipitate insoluble in

concentrated NH3