The word chromatography originates from the Greek word ‘khromatos’ meaning color writing. Definition: A technique used for separating the components of a mixture by their distribution between a stationary and a mobile phase is called chromatography. Chromatography Principle: Chromatography is a method used primarily for the separation of a sample mixture and involves the distribution…
The removal of a solute from its solution by the addition of a solvent in which the solute is more soluble but which itself is not soluble in solution is called solvent extraction. Ether Extraction: Many organic compounds are produced along with minor products in aqueous solution. Such compounds are shaken with ether taken in…
The direct conversion of solid into vapour without passing through liquid state by heating is called sublimation. Explanation: Sublimation is used to purify solid substances. – Iodine, ammonium chloride, naphthalene, anthracene, and benzoic acid can sublime. A substance to be sublimed is taken in a watch glass covered with an inverted funnel. The funnel is…
The obtaining of crystals by cooling the hot saturated solution leaving behind mother-liquor is called Crystallization. Basic Principal: The preparation of a chemical compound usually affords a crude product and there is an need to purify it by crystallization from a suitable solvent. The basic principle of crystallization is the fact that the solute should…
The process of separating solids or suspended particles from liquids by passing through a filter medium is called filtration. Filtrate: The liquid obtained after filtration is called filtrate. Residue: The substance which is left on the filter paper after filtration is called residue. Types of Filtration: Many of filter mediums can be used for filtration….
A type of analysis in which constituents of substances are detected or identified is called qualitative analysis. A type of analysis in which constituents of substances are detected or identified is called qualitative analysis. Following steps involve in the quantitative analysis: (i) Obtaining of a pure sample (ii) Separation of desired constituents (iii) Measurement…