Analytical chemistry
ICSE · Class 10 · Chemistry
Quick revision notes for Analytical chemistry — ICSE Class 10 Chemistry. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Introduction to Analytical Chemistry
- Analytical chemistry deals with analysis of chemical substances to explore nature, composition and constitution
- Two main types: Qualitative analysis (what is present) and Quantitative analysis (how much is present)
- Qualitative analysis determines nature and quality of substance under examination
Colour of Salts and Their Solutions
- Salts are ionic compounds consisting of cations (positive ions) and anions (negative ions)
- Cations are basic radicals (come from base), anions are acidic radicals (come from acid)
- Colour of salt is due to presence of coloured ions
Action of Ammonium Hydroxide (NH₄OH)
- NH₄OH is an important reagent in qualitative analysis
- Used for precipitation of metal cations as hydroxides
- Used for formation of complex salts with certain metals
Action of Sodium Hydroxide (NaOH)
- NaOH is largely used for precipitation of insoluble hydroxides from metallic salt solutions
- Formation and colour of precipitates help in identification of metal ions
- Some precipitated hydroxides dissolve in excess NaOH forming soluble complex salts
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