(i)Name the type of bond present in common salt and also state reason behind it.
(ii) Give the electron dot structure for the formation of common salt.
(iii) What is the nature of common salt and why?
(iv) Will solution of common salt in water react with Potassium? Give reason in support of
your answer.
(v)Why it has high melting and boiling point?
Answers
Answer:
1) Ionic bonding in sodium chloride. An atom of sodium (Na) donates one of its electrons to an atom of chlorine (Cl) in a chemical reaction, and the resulting positive ion (Na+) and negative ion (Cl−) form a stable ionic compound (sodium chloride; common table salt) based on this ionic bond.
2) Sodium chloride is an ionic compound formed by the transfer of electrons from sodium to chlorine. Sodium atom has oxidation number of +1. ... Sodium atom will loose one electron to gain noble gas configuration and form sodium cation with +1 charge. Chlorine atom has oxidation number of -1.
3) Sodium chloride or common salt is the chemical compound NaCl, composed of the elements sodium and chloride. Salt occurs naturally in many parts of the world as the mineral halite. Seawater has lots of salt; it contains an average of 2.6% (by weight) NaCl, or 78 million metric tons per cubic kilometer.
4) When common salt is dissolved in water, Boiling point of the solution increases. The boiling point of a substance is the temperature at which the vapor pressure of the substance equals atmospheric pressure. A solution containing a non-volatile solute, having a lower vapor pressure than the pure solvent, must be at a higher temperature before its vapor pressure equals atmospheric pressure and it boils. Thus, the boiling point of a solution containing a non-volatile solute is higher than that of the pure solvent. This effect is called boiling point elevation.
5)All atoms and molecules have a weak attraction for one another, known as van der Waals attraction. ... In general, larger molecules have higher boiling points than smaller molecules of the same kind, indicating that dispersion forces increase with mass, number of electrons, number of atoms or some combination thereof.