Question

List the following bases in order of strength, strongest to weakest.

Pb(OH)₂, K_b=9.6x10^-4
H₂NOH, K_b=1.2x10^-8
NH₄OH, K_b=1.8x10^-3
NH₃, K_b=1.8x10^-5
CH₃NH₂, K_b=4.2x10^-4

Answer 1

Ansorers According to Arrhenius theory base is a substance that dissociates i into water to produce oheigns (hydroxide ions). The strength of a base depends upon base dissociation constant kb. A strong base has a high value of ko and completely dissociates to give of ions, so higher the value of ky stronger is the base and lower the value of kb, weaker is the base, 1 In the given compounds kind of NH OH is highest and ky of H₂ NOH is lowest. So, NH OH is strongest base and HanoH is beakest base, The order of strength of bases from strongest to weakest is as follows: - NHA OH [KG = 1:8x103) > Pb(OH)₂ (kg = 916X10%) > CH₃NH2 (k2 = 4.2x109) > - NH₃ (kb = 118x105) HANOH C kg = 1+ 2x108) strongest bone y weakest base buse