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- What was the original 1. concentration (M) of an aqueous acetic acid (CH3COOH) solution whose pH is 2.68 (25.0 oC)? The Ka = 1.80 x 10–5When ammonium sulfate dissolves, both the anion and cation have acid-base reaction: (NH4)2SO4(s) 2NH4* + SO42- NH4* + NH3(aq) + H* SO2- + H2O → HSO4 + OH Ksp = 276 Ka = 5.70 x10-10 Кь 3 9.80 х 10-13 (a) (b) (c) Write a charge balance for this system. Write a mass balance for this system. Find the concentration of NH3(aq) if the pH is fixed at 9.25.Calculate the pH of a 0.052 M (C2H5)2NH solution (Kb = 1.3 × 10-³). pH =
- Q3. This question is about the pH of several solutions. Give all values of pH to 2 decimal places. (a) (i) Write an expression for pH. (b) (ii) Calculate the pH of the solution formed when 10.0 cm³ of 0.154 mol dm-³ hydrochloric acid are added to 990 cm³ of water. The acid dissociation constant, Ka, for the weak acid HX has the value 4.83 x 10-5 mol dm-³ at 25 °C. A solution of HX has a pH of 2.48 Calculate the concentration of HX in the solution. Page 4 of 14A diprotic acid (H₂A) has Kal = 4.54 x 10-7 and K₁2 = 5.59 x 10-¹1. What is the pH of a 0.396 M H₂A solution? pH =Calculate the pH of a weak base solution ([B]o > 100 • Kp). Calculate the pH of a 0.104 M aqueous solution of triethanolamine (C,H1503N, K, = 5.8×10") and the equilibrium concentrations of the weak base and its conjugate acid. pH (C,H1503N]equilibeium (C,H15O3NH"]equilibrium Check & Submit Answer Show Approach Calculate the pH of a weak base solution (quadratic equation). Calculate the pH of a 0.0362 M aqueous solution of ethylamine (C,H;NH2. Kg – 4.3×10“) and the equilibrium concentrations of the weak base and its conjugate acid. pH (C,H;NH;lequilibrium M. (C,H,NH3" Jequilibrium M. Check & Submit Answer Show Approach
- Calculate the molar concentration of formic acid, HCOOH (Ka = 1.80 x 10-4) that was 3% ionized.Calculate the pH of a 6.9 x 10¬³-M solution of H2SO4 ( 1.2 x 10-2). -3 a2 pH =2:10 2- 3C₂²- + 1 2 3 4 N Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction. NH3(aq) + HCl(aq) (s) Question 1 of 10 O Reset LO 5 OH H₂O 6 CI 7 6 个 x H₂O Tap here or pull up for additional resources Submit 8 9 11 (aq) O H H3O+