Qualitative Analysis Inorganic chemistry

Qualitative analysis is used to identify compounds. Those compounds can be metals, cations, anions, gases. These several compounds can be in a single mixture. Therefore we have to follow a specified procedure to identify these compounds one by one. There are many different experiments to identify different compounds. In qualitative analysis, we observe after a reaction

  • forming a colourful solution
  • forming a precipitate
  • emitting a gas or gases

to decide which compounds, ions are presence.

Qualitative Analysis for cations

Identify ammonium salts identify chromium compounds identify d block cations by ammonia solution Testing for nickel ion


Qualitative Analysis for anions

Testing for fluoride (F-) Identify halides ( Cl-, Br-, I-) Identify carbonate (CO32-) ion Testing for thiosulfate (S2O32-) Testing for phosphate ion (PO43-) Testing for sulfate (SO42-) ion


Qualitative Analysis for gases

Releasing gases

Problems

Separating solutions

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