Which of the following anions is a weaker base than H_2O? fluoride bromide nitra

Question

Which of the following anions is a weaker base than H_2O? fluoride bromide nitrate periodate Suppose you had aqueous solution of the following salts, what of the will be base of the aqueous solution? NH_4ClO C_6H_5NH_3NO_2 Both solution will have a pH less than 7 Both solution will have a pH greater than 7 Solution 1 will have a pH less than 7, but Solution 2 will have a pH greater than 7 Solution 1 will have a pH greater than 7,but Solution 2 will have a pH less than 7 identity whether the following Bronsted equilibrium lie right or left: H_2SO_3 + H_AsO_3^- HSO_3^- + H_3AsO_3 lies: HCl + I^- Cl^- + HI lies: Assuming you had aqueous solutions of each of the followimg having identical initial concentrations, N_2H_5I KBr C_6H_5NH_2 HCN KOCN which solution (s) will have [OH^-] > [H_3O^+] (NOTE: more than one answer may be possible) Which solution will have [H_3O^+] = [OH^-] which solution will have the higest [H_3O^+]? Which solution will habe the lowest [H_3O^+]?

Explanation / Answer

6 ) d ) periodate

explanation HIO4 is the strognest acid. its conjugate base is weak

7) answer : d )

explanation:

weak acid weak base pH formula

NH3 pKb = 4.74

HClO pKa = 7.4

pH = 7 + 1/2 [pKa - pKb] -----------------> formula

pH = 7 + 1/2 [7.4 - 4.74]

pH = 8.33

aniline pKb = 9.13

HNO2 pKa = 3.25

pH = 7 + 1/2 [3.25 -9.13]

pH = 4.06

3 )

I ) lies right

II) left

4)

a ) KOCN

because it is strong base + weak acid salt

b) II ) KBr

because strong acid + strong base salt

c) I ) N2H5 I , HCN

d) III ) C6H5NH2 , KOCN

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