Question

1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e) NHA. f) NHg) NO3, h) CO32-. i) HBr, j) HCN 3. i). Write the formula of four strong acids and four strong bases. ii). List four factors that affect the strength of an acid. iii). Predict the relative strength of the following compounds: H2O, H2S and H2Se. iv). Which of the following is the stronger acids: CHCICOOH or CHCI-COOH? Explain. v). Al is not a Bronsted acid, Al(H2O). * is. Explain. vi). All Bronsted acids are Lewis acids, but the reverse is not true. Give two examples of two Lewis acids that are not Bronsted acids. vii). Which of the following is the stronger base: NH3 or NF3? viii). Which of the following is the stronger Base: NH3 or PH: ? 4. a. Describe the hydration of SO3 as a Lewis acid-base reaction. b. Identify Lewis acid and Lewis base in each of the following reaction:

Answer 1

1) Answer is C).

According to Arrhenius concept, acid are H+ donor and base are OH- donor but in c) NH3 abstract H+ and act as base.

2) Bronsted acid are H+ donor and bases are H+ acceptors.

Bronsted acid : H3O+, NH4+, HBr, HCN

Bronsted base : NO3- , CO32-

Both : H2O, NH3, NH2-, OH-