Predict the direction in which the equilibrium will the lie for the reaction H_2

Question

Predict the direction in which the equilibrium will the lie for the reaction H_2 SO_3 (aq) + HCO_3^- (aq) HSO_3^- (aq) + H_2 CO_3 (aq) K_al (H_2 SO_3) - 1 Times 10^-2; K_al (H_2 CO_3) - 4.2 Times 10^-7 to the right to the left in the middle Which of these species will act as a Lewis acid? NH_3 NH_4^+ H_2 O BF_3 F^- The oxides CO_2 and SO_3 will form the following acids in water, respectively. H_2 CO_3 (aq) and H_2 SO_3 (aq) H_2 CO_3 (aq) and H_2 SO_4 (aq) H_2 CO_2 (aq) and H_2 SO_4 (aq) The salt hydrolysis reaction for NH_4 NO_3 that represents the acidic or basic nature of the solution is NH_4^+ (aq) + H_2 O(I) NH_3 (aq) + H_2 (g) + OH^- (aq) NO_3^- (aq) + H_2 O (I) H_3 O^+ (aq) + NH_3 (aq) NH_4^- (aq) + NO_3^- (aq) NH_4 NO_3 (aq) Which one of the these salts will form a neutral solution on dissolving in water? NaCl KNO_2 NaCN NH_4 NO_3 FeCl_3 Which one of the these salts will form a basic solution on dissolving in water? NaCl KNO_2 NaCN NH_4 NO_3 FeCl_3 What is the pH of a 0.023 M solution of HCN (K_a = 4.9 Times 10^-10? 1.64 10.95 3.05 5.47 4.97 What is the pH of a 0.15 M solution of the weak base aniline [C_6 H_5 NH_2: K_b = 3.8 Times 10^-10] 5.12 8.88 13.18

Explanation / Answer

13.

(A). to the right

because Ka of H2SO3 is greater than Ka of H2CO3

14.

(D) BF3

Because it has a vacant orbital to which an electron pair can be accepted.

15.

(B) H2CO3 (aq.) and H2SO4 (aq.)

16.

(C) NH4+ (aq.) + H2O (l) ---------> NH3(aq.) + H3O+ (aq.)

17.

(a) NaCl

18.

(B) KCN

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