11. a) The pH of 0.015 M HNO2(aq) was measured as 2.63. What are the values...
Calculate the pH and pOH of the following aqueous solutions: (a) 0.15 mol·L–1 CH3COOH(aq); (b) 0.15 mol·L–1 CCl3COOH (aq); (c) 0.15 mol·L–1 HCOOH(aq). When the pH of a 0.10 mol·L–1 HClO2 aqueous solution was measured, it was found to be 1.2. What are the values of Ka and pKa of chlorous acid? (b) The pH of a 0.10 mol·L–1 propylamine, C3H7NH2, aqueous solution was measured as 11.86. What are the values of Kb and pKb of propylamine?
Calculate the pH and pOH of the following aqueous solutions: (a) 0.15 mol·L–1 CH3COOH(aq); (b) 0.15 mol·L–1 CCl3COOH (aq); (c) 0.15 mol·L–1 HCOOH(aq). When the pH of a 0.10 mol·L–1 HClO2 aqueous solution was measured, it was found to be 1.2. What are the values of Ka and pKa of chlorous acid? (b) The pH of a 0.10 mol·L–1 propylamine, C3H7NH2, aqueous solution was measured as 11.86. What are the values of Kb and pKb of propylamine?
Copy of Calculate the pH during the titration of 20.00 mL of 0.1000 M HNO2(aq) with 0.2000 M NaOH(aq) after 7 mL of the base have been added. Ka of nitrous acid = 7.1 x 10-4.
Calculate the pH during the titration of 20.00 mL of 0.1000 M HNO2(aq) with 0.2000 M NaOH(aq) after 6.5 mL of the base have been added. Ka of nitrous acid = 7.1 x 10-4. Show with ICE table and equations
Nitrous acid, HNO2(aq), has a Ka of 4.5 x 10-4 at 25 °C. What is the pH of a solution that contains 1.0 M KNO2(aq) and 0.50 M HNO2(aq).
What is the pH of a 0.043 M solution of nitrous acid, HNO2? Ka = 4.6 x 10-4
What is the pH of an acidic mixture containing 0.005 M HBr and 0.025M HCN? HINT: take into account the type of acids that make up the mixture. Which solution is the least acidic? A. 3.0 M HNO3 B. 3.0 M HI C. 3.0 M HClO D. 2.0 M HCN and 2.0 M HF Calculate the pH of a basic solution made from 255 mg of pyridine (C5H5N) dissolved in 1L of water. The pKb for pyridine is 4.2. Determine...
(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And all weak bases use this one: B(aq)+ H2O(I) = BH*(aq)+ OH'(aq) Part A: Finding K, or Kb 3.012? What is the value of Ka for a weak acid if a 1.44 M solution has a pH 1. 2. A weak acid is 0.00987 M, but is found to be 25.5 % ionized. What is the pH? 3. The pH for...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a Ka - 7.1 x 104 and its conjugate base. a. What pH would provide maximum buffer capacity? b. What would be the buffer range for this acid? (Your answer should show the lowest and the highest pH that would provide a reasonably effective buffer.) 2. If you were provided with a 0.1 M solution of an unknown weak acid and a 0.1 M solution...
Need help on questions 1-3
Henderson-Hasselbalch: pH=pka + Log( [base]/(acid] ) 1. The value of Ka of nitrous acid (HNO2) is 4.6 x 104 M. Calculate the pH and the concentration of [H3O+] in a 0.02M aqueous solution of HNO2(aq). 2. Label conjugate acid-base pairs: HNO2(aq) + H2O → H30* + NO2 (aq) 3. What will happen to the reaction equilibrium if we increase the pressure in the reaction vessel? H2(g) + 12(e) → 2 HI(g)