Question

all of them pleass, its okay if its just the answer

14x3/2+2x6761) S.56xewto 10. What is the pH of a 0.20 M solution of NH.CI? K.(NH) = 1.8 x 101 a. 3.74 (6.4.98 c. 6.53 d. 9.02 Nil, CI 140 - 40 + NH₃ C1 -20 11. Which of these lists of molecules is arranged in order of increasing acid strength? HAS <H2O <H2Se 6. HS <H2Se <H:0 2 H0< H2S = H2Se d. H:0 <HSe <HS 12. Which of the following would decrease the K a. Lowering the pH of the solution c. Adding a solution of KI Poral 25 sbl » of Pb(NO), for Pblz? b. Adding a solution of Pb(NO3)2 d. None of a), b.), or c.). 131 A titration of an acid and base to the equivalence point results in a noticeably acidic solution. It is likely this titration involves (a) a strong acid and a weak base. b. weak acid and a strong base. < a weak acid and a weak base (where K. equals Kb). K a strong acid and a strong base. 14. Calculate the pH of a 0.14 M HNO2 solution that is 5.7% ionized. a. 0.85 b. 1.70 2.10 d. 11.90 - 052Tot 14 ock C, 15. A 100.0 ml, sample of 0.10 M CH(OH), is titrated with 0.10 M HBc. Determine the pH of the solution after the addition of 100.0 mL HBr. a. 12.70 b. 1.30 @7.00 d. 12.00 /16/ For PC (K = 24 x 10), will a precipitate of PbCl form when 0.10 L of 3.0 x 10M Pb(NO3)2 is added to 400 mL of 9.0 x 10M NaCl? Yes, because Q > Kap. No, because Q=K, Po (NO), Nach c. No, because Q <k. Yes, because Q<K.. pbil, + Nanos 2 ux 10 = Pb (1 OKQ aosu 17. Over what range of pH is a HOCI - NaOCI buffer effective? Ka HOCI 3.2 x 10 TpH 2.0 - pH 4.0 (ở pH 7,5 - pH 95 c. pH 6.5 - pH 8.5 d. pH 6.5 - pH 9.5 pH = pka pH = 7.50

Answer 1

To 0.2m NhuCl salt of weak base and strong feid Why cl + HO Z NHLOH thel 0.2 m 0,2-012h et 0.2h och so kn= kw z 602h) (orzh) -0.2h2 kb. 0,2-0,ch inh ñ ' s kg=1088155 - kn= oreh2 { pkb = -log1.8 so pH = Į [pk w mag pike - Logc] = ļ [14-5+1091.8 - log (0.2)] p”. Ls-350 » PP - Đ• 9 11 option (6) is correcta

s down the group size increases, hence bond strength decreases soteid Strength increases. so order Hochs <H₂ se option (e) is correct.