dissociation of molecules

Dissociation of Solute Molecules - A number of electrolytes dissociate in solution to give two or more particles (ions). Therefore, the number of solute particles, in solution of such substances is more than the expected value. Accordingly, such solutions exhibit highe..

A number of electrolytes dissociate in solution to give two or more particles (ions). Therefore, the number of solute particles, in solution of such substances is more than the expected value. Accordingly, such solutions exhibit higher values of colligative propertie..

Sodium chloride an ionic compound has the sodium ion, Na + and chloride ion Cl - held together by strong electrostatic force of attraction in the solid state. When dissolved in water, the ions become free to move. The process of breaking of NaCl into free Na + and Cl - ions is dissociation..

Calculation of Degree of Dissociation - Degree of Dissociation [ a ] - It is defined as the fraction of the total number of molecules undergoing dissociation at a given concentration. Example: If 100 molecules of acetic acid are added to H 2 O of wh..

Theory of Electrolytic Dissociation - The chief postulates of the ionic theory or theory of electrolytic dissociation are as follows: On dissolving in water an electrolyte, breaks up into free cations and anions. The energy associated with moving charges is called current or ele..

It is defined as the amount of energy required to break one mole of bonds of a particular type between the atoms of a molecule in the gaseous state. It is expressed in terms of kJ mol - 1 . When a bond is formed between the atoms, energy is released and the bonded atoms have lesser ener..

It is the fraction of the total number of molecules, which dissociate into simpler ions i.e.,..

This means that two hydrogen atoms are bonded together by a covalent bond. The bond dissociation energy of hydrogen molecule has been found to be 458 kJ mol - 1 and bond length equal to 74 pm. Moreover, since no unpaired electron is present in hydrogen molecule, it is ..

. The single bond in the molecule is also in agreement with bond dissociation energy of 155 kJ mol - 1 and bond length equal to 142 p..

Thus, nitrogen molecule has three bonds, one s - and two p -bonds. This is in accordance with very high bond dissociation energy (945 kJ mol - 1 ) and small bond length (110 pm) of the molecule. The molecule is diamagnetic because there are no unpaired electr..