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as level chemistry > test for halides > Flashcards

test for halides Flashcards

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1
Q

what reagent do you add to ionic salts containing halide ions so precipitates are formed

A

silver nitrate
AgNO3

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2
Q

when you react NaCl + AgNO3 what colour precipitate is formed

A

white ppt

(dissolves in ammonia)

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3
Q

when you react NaBr + AgNO3 what colour precipitate is formed

A

off white/cream ppt

(dissolves in excess ammonia)

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4
Q

what is the simplest ionic reaction for the reaction of halides with silver nitrate

(think about spectator ions)

A

X- (aq) + Ag+ (aq) —> AgX (s)

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5
Q

why must AgNO3 be acidic

A

AgNO3 is acidic as it prevents the formation of Ag2CO3 which is a white ppt

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6
Q

when you react NaI+ AgNO3 what colour precipitate is formed

A

yellow ppt

insoluble in ammonia

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7
Q

what would you observe when NaF and AgNO3 react

A

nothing as sodium fluoride is soluble in water

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as level chemistry (50 decks)

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