Write the chemical reaction whose equilibrium constant is (a) ka for benzoic acid, c6h5co2h (b) kb for benzoate ion, c6h5co 2 (c) kb for aniline, c6h5nh2 (d) ka for anilinium ion, c6h5nh 3

a) Ka for benzoic acid, C6H5CO2H 
HA + H2O ⇋ A^- + H3O^+ 
Ka = [A^-][H3O^+] / [HA] 
C6H5CO2H + H2O ⇋ C6H5CO2^-^- + H3O^+ 
Ka = [C6H5CO2^-][H3O^+] / [C6H5CO2H] 

b) Kb for benzoate ion, (C6H3CO2)^ - 
B + H2O ⇋ [BH]^+ + OH^- 
Kb = [[BH]^+][OH^-] / [B] 
C6H3CO2^- + H2O ⇋ C6H5CO2H + OH^- 
Kb = [C6H5CO2H][OH^-] / [C6H3CO2^-] 

c) Kb for amiline, C6H5NH2 amiline? aniline 
C6H5NH2 + H2O ⇋ [C6H5NH3]^+ + OH^- 
Kb = [[C6H5NH3]^+][OH^-] / [C6H5NH2] 

d)Ka for amilimium ion, (C6H5NH3)^+ 
C6H5NH3^+ + H2O ⇋ C6H5NH2 + H3O^+ 
Ka = [C6H5NH2][H3O^+] / [C6H5NH3^+]

b. examine and describe cells

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.