Question

Briefly explain how the presence of charged ions in ionic solids such as NaCl(s) helps to explain why NaCl(s) is soluble in water.

Answer 1

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A)  

When any 2 substance want ot miscible or if one substance want to get soluble in another substance then the 2 diffrent kind of molecule need to interact with each other.

Not only the interaction is enough there must be a strong attraction of both the molecules to get soluble in each other.The attractive forces must be strong between two molecules.

For example the table salt Nacl dissolves easily in a water it is because the water molecule attracts the postively charged of sodium ions strongly and also the negatively charged of cholride ions . Due to which the solubilizing property of both is more . And hence this interaction we are calling as ion - dipole interaction.

The sodium caations and cholride ions need to get distributed for that the water molecules has to give an space to for the ions movement . During this some of the hydrogen bond are lost but the energy that is needed will come after the interaction of water and sodium cholride take place.

There are other salt which dissolve in water but not as easily as Nacl. It is because the Nacl has lower charges due to which water can easily pull the Nacl.If the salt have more charges the more the electrostatic attraction and chances of interaction get decrease.