test for halides Flashcards
what reagent do you add to ionic salts containing halide ions so precipitates are formed
silver nitrate
AgNO3
when you react NaCl + AgNO3 what colour precipitate is formed
white ppt
(dissolves in ammonia)
when you react NaBr + AgNO3 what colour precipitate is formed
off white/cream ppt
(dissolves in excess ammonia)
what is the simplest ionic reaction for the reaction of halides with silver nitrate
(think about spectator ions)
X- (aq) + Ag+ (aq) —> AgX (s)
why must AgNO3 be acidic
AgNO3 is acidic as it prevents the formation of Ag2CO3 which is a white ppt
when you react NaI+ AgNO3 what colour precipitate is formed
yellow ppt
insoluble in ammonia
what would you observe when NaF and AgNO3 react
nothing as sodium fluoride is soluble in water