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Halide Ions

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Total cards: 18•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (18)

#1
Front (Question)

Trend in Reducing Power Define

Back (Answer)

Reducing power of halides increases down the group. To reduce something, the halide ion needs to lose an electron from its outer shell. How easy this is depends on the attraction between the nucleus and outer electrons

#2
Front (Question)

Two reasons why attraction between nucleus and outer electrons of halides gets weaker as you go down the group

Back (Answer)

• The ions get bigger, so the electrons are further away from the positive nucleus. • There are extra inner electron shells, so there’s a greater shielding effect

#3
Front (Question)

Further down the group a halide ion is…

Back (Answer)

The easier it loses electrons and the greater its reducing power

#4
Front (Question)

Reactions with Sulfuric Acid

Back (Answer)

All halides react with concentrated sulfuric acid to give a hydrogen halide as a product

#5
Front (Question)

Two Equations for Reaction of NaF or NaCl with H2SO4 Misty Fumes of…

Back (Answer)

NaF + H2SO4 –> NaHSO4 + HF. NaCl + H2SO4 –> NaHSO4 + HCl. HF or HCl

#6
Front (Question)

Two Equations for Reaction of NaBr with H2SO4 SO2 Fumes Br2 Fumes

Back (Answer)

NaBr + H2SO4 –> NaHSO4 + HBr. 2HBr + H2SO4 –> Br2 + SO2 + 2H2O. Choking fumes. Orange fumes

#7
Front (Question)

Three Equations for Reaction of NaI with H2SO4

Back (Answer)

NaI + H2SO4 –> NaHSO4 + HI. 2HI + H2SO4 –> I2 + SO2 + 2H2O. 6HI + SO2 –> H2S + 3I2 + 2H2O

#8
Front (Question)

Describe H2S

Back (Answer)

Toxic and smells of bad eggs

#9
Front (Question)

Test for Halides (describe)

Back (Answer)

Add dilute nitric acid (to remove ions which might interfere with the test). Then add a few drops of silver nitrate solution (AgNO3). A precipitate is formed of a silver halide

#10
Front (Question)

Colour of precipitate of silver fluoride

Back (Answer)

No precipitate

#11
Front (Question)

Colour of precipitate of silver chloride

Back (Answer)

White precipitate

#12
Front (Question)

Colour of precipitate of silver bromide

Back (Answer)

Cream precipitate

#13
Front (Question)

Colour of precipitate of silver iodide

Back (Answer)

Yellow precipitate

#14
Front (Question)

How to be extra sure of results of test for halides?

Back (Answer)

Add ammonia solution

#15
Front (Question)

Describe result of silver chloride precipitate in ammonia

Back (Answer)

White precipitate. Dissolves in dilute NH3

#16
Front (Question)

Describe result of silver bromide precipitate in ammonia

Back (Answer)

Cream precipitate. Dissolves in concentrated NH3

#17
Front (Question)

Describe result of silver iodide precipitate in ammonia

Back (Answer)

Yellow precipitate. Insoluble in concentrated NH3

#18
Front (Question)

Which is the most soluble and least soluble in test of silver halides in ammonia?

Back (Answer)

Silver chloride is most soluble. Silver iodide is least soluble