Answer to Question #122348 in General Chemistry for Johannes Steven

Question

18. Which of the following weak acids ionizes to give the strongest conjugate base? (a) HClO (b) CH3COOH (c) HF (d) HNO2 (e) HCN. 19. Which of the following is true about a 0.10 M solution of a weak acid Hx? (a) [X^-] = 0.10 M (b) pH = 1 (c) [HX] > [H^+] (d) [H^+] = 0.10 M (e) both b and d 20. Calculate the hydrolysis constant for the cyanide ion, CN^-. 21. Calculate the pH of a 0.50 M solution of NaNO2. 22. What is the concentration of a sodium acetate solution if the pH of the solution is 9.19 23. What is the pH of 0.060 M NH4Cl? 24. What is the concentration of ammonium chloride in a Solution if its pH is 4.80?

Answer 1

Answer 18) HCN is the weakest acid so CN^- will be strongest conjugate base.

Answer 19) since HX is weak acid so it won't dissociate completely . It will dissociate very less hence [HX]>[H⁺]

Answer 20) CN^-+H₂O<-->HCN + OH^-

Hydrolysis constant K_h= K_w/K_a

Answer 21) please provide Ka value for acid

Answer 22, 23,24) please provide all the supporting information.