Question

Ashish always tried to understand the theoretical concepts learnt in his class better by performing the experiment in laboratory, whenever possible. Once, he studied about solubility of different compounds in water. Then under the supervision of his teacher he took potassium chloride, calcium carbonate, ethanol and ethyl amine and try to dissolve in water one by one.

He was surprised that all the four compounds are dissolved in water and discussed this result with his teacher.

(i) Why did Ashish think that only certain compounds are soluble in water but others are not?

(ii) What explanation was given by the teacher? Explain.

(iii) What values are associated with Ashish?

Answer 1

(i) Ashish thinks so because the former two compounds i.e., potassium chloride and calcium carbonate are ionic in nature whereas the later two compounds i.e., ethanol and ethyl amine are covalent in nature which should be insoluble in water.

(ii) Teacher told him that the former two compounds dissolved because of their ionic nature whereas the later two dissolved because of ${H}$-bonding with the water molecules.

(iii) Values shown by Ashish is experimental aptitude, curious, serious about his studies.