How Soap perform cleansing action?
Soaps and detergents perform the cleaning action because the polar parts of their molecules are water soluble due to hydrogen-bonding and non-polar parts remain outside water.
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Molecular Solids
“The crystals consisting of molecules, which are held together through Vander Waals’ forces, are called molecular crystals.” Explanation: Since Van der Waals’ attractive forces are weaker, therefore, molecular crystals are soft and have low melting points and low lattice energies. These crystals are poor conductors of electricity. This is because electrons are bound to individual…
What is chromatography?
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…
Why is Chemistry called The Central Science?
Students & professionals from other sciences quite often ask the question, why is chemistry called the Central Science. Is it physics with the fundamental laws small blocks of built atoms added mass that allows the calculations to take place and prediction of the final product Or Is it chemistry that enables thought process atoms to…
MOLECULAR FORMULA DEFINITION
A formula which tells the actual number of atoms present in a molecule of a substance is known as molecular formula. Examples: H2O2 and C6H12O6 are the molecular formulas of hydrogen peroxide and glucose respectively.
Classification of crystals
In 1850, a French mathematician August Bravis observed that crystal lattice of substances can be categorized into seven types. These are called Bravis Lattices and their units cells are referred to as Bravis unit cells. A crystal system may be identified by the dimensions of a unit cell along its three edges or axe, a,…
Crystallization definition
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…
