Question

1) When dissolved in water, chemicals may undergo electrolytes or remain undissociated and form nonelectrolytes For chemicals given below, write a balanced equation for their hydration in weak dissociation to fer strong electrelytes or water give name of each chemical, and state a theoretical van loffs factor, (Hint: refer to pages 316-321) Example: FeCh(s), a strong electrolyte FeCl2(s) mq Fe2+ (aq) + 2cr (aq) iron (I1) chloride a) K sOs(s), a strong electrolyte b) CHsCOOH (aq) a weak electrolyte CH CHIOH)CH (,a nonelectrolyte isopropyl alcobol CH151 Homework assignment-CH8-v4.1

I’m not understanding how to complete this. Or how to figure out the van Hoffa factor. Thank you!!

Answer 1

k_2 SO_4 (s) 2k^+ + SO_4^2- Salt dissociates completely V ant Hoff factor i = 3, actual situation less than 3. V ant Hoff factor is ratio between actual concentration of particles produced when substance is dissolved and concentration of substance is calculated from its mass. CH_3 COOH H^+ + CH_3 COO^- It is partially dissociated if completely dissociated than van't Hoff factor would be i = 2, since its no dissociated completely it is more than 1 but less than 2 thus 1 > i < 2 acetic acid i = 1 For most non - electrolysis van't Hoff Factor is essentially 1. Since isopropyl alcohol is non electrolyte if does not dissociate in water its factor is 1 therefore i = 1