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^+]

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acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.