Analytical chemistry — Flashcards

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The branch of chemistry which deals with the analysis of a chemical substance or its solution to explore its nature, composition and constitution is called Analytical chemistry.

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In qualitative analysis, the nature and quality of the substance under examination are determined.

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It deals with the determination of constituents of a chemical substance or mixture.

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The colour of a salt is due to the presence of a coloured ion in it. Ions of normal elements are colourless, while ions of transitional elements, lanthanides and actinides are generally coloured. Exam…

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A positively charged ion is called a cation or a basic radical because it comes from the base during neutralisation. A negatively charged ion is called an anion or an acidic radical because it comes f…

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Precipitation is the process which involves the formation of an insoluble substance on mixing two or more solutions together. The insoluble substance formed is called a precipitate.

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Ammonium hydroxide is used for precipitation of metal cations, formation of complex salts, making the medium weakly basic, and providing ammonia.

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CaCl2 + 2NH4OH → Ca(OH)2 ↓ (dull white) + 2NH4Cl. A dull white precipitate of calcium hydroxide is formed and it remains insoluble in excess ammonium hydroxide.