OCR - A-Level - Chemistry - Testing for Ions Flowchart

Description

A level Chemistry (Module 3) Flowchart on OCR - A-Level - Chemistry - Testing for Ions Flowchart, created by Josh Anderson on 08/02/2017.
Josh Anderson
Flowchart by Josh Anderson, updated more than 1 year ago
Josh Anderson
Created by Josh Anderson over 7 years ago
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Resource summary

Flowchart nodes

  • Testing for ions
  • Add dilute strong acid
  • Bubble the gas released through limewater
  • Does it go cloudy?
  • Carbonate ion, CO3 ^(2-)
  • Yes
  • Add dilute hydrochloric acid and barium chloride
  • Is a white precipitate formed?
  • Sulfate ion,SO4 ^(2-)
  • Dissolve in water
  • No
  • Yes
  • Add aqueous silver nitrate
  • Is the colour obvious?
  • Add dilute aqueous ammonia
  • No
  • No
  • Note the colour
  • Is the colour obvious?
  • Yes
  • Yes
  • Add concentrated aqueous ammonia
  • Is the colour obvious?
  • Yes
  • Is there a white precipitate?
  • Silver chloride, AgCl
  • No
  • No
  • Is there a cream precipitate?
  • Silver bromide, AgBr
  • Is there a yellow precipitate?
  • Silver iodide, AgI
  • Does it dissolve in dilute ammonia?
  • Does it dissolve in concentratedammonia?
  • Yes
  • Yes
  • Yes
  • Yes
  • No
  • No
  • No
  • No
  • No
  • Add sodium hydroxide solution and heat
  • Test the gas released
  • Does it turn red litmus paper blue?
  • No
  • Ammonium ions
  • Yes
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