Question

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base: (a) OH– (b) F– (c) H+ (d) BCl3 .

Is there any change in the B and N atoms hybridisation due to the following reaction? BF3 + NH3 —> F3B.NH3

Acidity of BF3 can be explained on the basis of which of the following concepts?

(i) Describe a situation where you had to apply the Law of Mass Action to solve a problem in a laboratory or academic setting. What was the challenge, how did you apply the principle, and what was the outcome? (ii) A solution of NH4Cl in water shows pH less than 7. why? (iii) What is the effect of increasing pressure in the given reactions? Give reasons. (a) PCl5(g) → PCl3(g) + Cl2(g) (b) N2(g)+O2(g) → 2NO(g) (iv) Which of the following are lewis acids? H2O, BF3, H+, NH4+