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Edexcel Chemistry topic 4 halide questions and notes
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Edexcel Chemistry topic 4 halide questions and notes:balancing equations etc
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Silver halide saltsResults
Halide ion Chloride Bromide Iodide
Addition of White precipitate Cream precipitate Yellow precipitate
silver nitrate.
Addition of Precipitate soluble Precipitate Precipitate
dilute ammonia. insoluble insoluble
x
Addition of Precipitate soluble Precipitate
conc. ammonia. insoluble
Exposure of Darkens No change No change
silver halide to white to grey/purple
sunlight.
Chemical equations
1. Addition of silver nitrate to a solution of a halide ion forms a solid silver halide salt.
Write full chemical and ionic equations for the reactions with chloride, bromide and
iodide ions.
Chloride
KCl(aq) + AgNO3(aq) KNO3(aq) + AgCl(s)
Ionic equation:
Ag+(aq) + Cl-(aq) = Agcl(s)
Bromide
…
KBr(aq) + AgNO3(aq) KNO3(aq) + AgBr(s)
………………………………………………………………………………………………………
… Ionic equation:
Ag+(aq) + Br-(aq) = AgBr(s)
………………………………………………………………………………………………………
Iodide
KI(aq) + AgNO3(aq) KNO3(aq) + Agi(s)
…………………………………………………………………………………………………………
… Ag+(aq) +I-(aq) = AgI(s)
………………………………………………………………………………………………………
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