Negative Ion Tests

CARBONATE CO3 2-
1. TEST- add dilute hydrochloric acid to solid
  1. RESULT - effervescence (fizzes), carbon dioxide produced (test with limewater).
CHLORIDE Cl- (in solution)
1. TEST- acidify solution with dilute nitric acid, then add aqueous silver nitrate
  1. RESULT- white ppt of silver chloride formed: ppt soluble in ammonia solution
BROMIDE Br- (in solution)
1. TEST- acidify solution with dilute nitic acid, then add aqueous silver nitrate
  1. RESULT- cream ppt of silver bromide formed: only slightly soluble in ammonia solution
IODIDE I- (In solution)
1. TEST- acidify solution with dilute nitric acid, then add aqueous silver nitrate
  1. RESULT- yellow ppt of silver iodide formed: insoluble in ammonia solution
NITRATE N03- (In solution
1. TEST- make solution alkaline with sodium hydroxide solution, then add aluminium foil ( or Devarda's alloy) and warm carefully
  1. RESULT- ammonia gas given off (test with moist red litmus)
SULFATE SO4 2- (In solution)
1. TEST- acidify solution with dilute hydrochloric acid, then add barium chloride solution OR acidify solution with dilute nitric acid, then add barium nitrate solution.
  1. RESULT- white ppt of barium sulfate formed for both tests

Resource summary

	Created by Safiya Caesar over 11 years ago