A solution is made with equimolar amounts of potassium nitrite and nitrous acid. What is true of the solution? O The solution is a buffer and has a pH greater than 7 The solution is not a buffer and has a pH greater than 7 The solution is a buffer and has a pH less than 7 The solution is not a buffer and has a pH less than 7

A solution is made with equimolar amounts of potassium nitrite and nitrous acid. What is true of the solution? O The solution is a buffer and has a pH greater than 7 The solution is not a buffer and has a pH greater than 7 The solution is a buffer and has a pH less than 7 The solution is not a buffer and has a pH less than 7

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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What is a buffer? Choose 2. a solution that resists changes in pH a solution that neutralizes a basic solution a weak acid-base conjugate pair a solution that neutralizes an acidic solution a strong acid-base conjugate pair
Which of the following aqueous solutions are good buffer systems? A) 0.22 M hydrobromic acid + 0.16 M potassium bromide B) 0.32 M ammonium nitrate + 0.32 M ammonia C) 0.18 M hypochlorous acid + 0.21 M sodium hypochlorite D) 0.13 M potassium cyanide + 0.29 M hydrocyanic acid E) 0.36 M acetic acid + 0.22 M potassium acetate
A buffer is prepared using 0.085 Mformic acid (HCOOH) and 0.085 Msodium formate (NaHCOO). Which of the following statements is FALSE? O The addition of 0.02 M HCI will decrease the pH slightly O The addition of 0.02 M NAOH will increase the pH slightly The formate ion can neutralize bases added to the buffer The addition of 1.0 M HCI will cause the pH to drop significantly Diluting the solution with pure water won't change the pH of the buffer
Prepare 100 mL of a buffer solution. Select and calculate the amounts of the appropriate materials required to prepare the following buffers. Also, calculate the buffering capacity and the maximum buffering capacity possible for the buffers at the given concentrations. 100 ml of 0.1 M buffer, pH 7.5 100 ml of a 0.2 M buffer pH 3.9 100 ml of a 0.1 M buffer pH 7.8 100 ml of a 0.1 M buffer pH 9.9
Which of the following aqueous solutions are good buffer systems? U 0.20 M hydroiodic acid 0.19 M sodium iodide 0.17 M nitrous acid 0.12 M sodium nitrite O0.33 M calcium chloride 0.24 M potassium chloride 0.16 M barium hydroxide 0.28 M barium bromide U0.31 M ammonia 0.39 M calcium hydroxide
85.0 mL of 0.375 M HNO3 is titrated by 0.750 M KOH. Calculate the pH of the acid solution before any titrant is added. pH = Calculate the pH after 35.92 mL of 0.750 M KOH is added to 85.0 mL of 0.375 M HNO3. pH = Calculate the pH after 42.50 mL of 0.750 M KOH is added to 85.0 mL of 0.375 M HNO3. pH = Calculate the pH after 83.5 mL of 0.750 M KOH is added to 85.0 mL of 0.375 M HNO3. pH = (Please type answer not write by hend)
Calculate the ratio of the concentration of carbonic acid to that of the bicarbonate ion:
A student wants to make a 0.75 mol/L buffer solution using potassium hydrogen sulfate, KHSO4, and a conjugate base. Which of the following options could be used as a conjugate base to make this buffer solution? Answer choices a 0.80 mol/L solution of H2SO4 a 0.50 mol/L solution of K2SO4 a 0.002 mol/L solution of K2SO4 a 9.0 mol/L solution of KHSO4
Consider the following two solutions: 2.0 M Mg(NO,), and 2.0 M KCN. Which of the following statements is true? Select one: O The Mg(NO)2 solution has the same boiling point and freezing point, but a higher pH than the KCN solution. O The Mg(NO )k solution has a higher boiling point and lower freezing point than the KCN solution. O The Mg(NO,), solution has a lower boiling point and higher freezing point than the KCN solution. O The Mg(NO), solution has the same boiling point and freezing point, but a lower pH than the KCN solution. O The Mg(NO), solution has a higher boiling point and higher freezing point than the KCN solution.
Given the concentrations of each solution, find the concentration of each ion 1. 0.2 M NaCl Na+ - 0.2M CI™ -0.2M 2. 6.2M CaCl₂ 3. 0.025 M Mg(OH)₂ 4. 1.6 MHC₂H₂O₂ 5. 1.12 M Fe(NO3)3 6. 0.5 M Li_S 7. 2 M HNO3
Which of the following statements are TRUE of buffer solutions? 1. A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate. 2. A buffer solution can be made by mixing equal concentrations of hydrochloric acid and sodium chloride. 3. A buffer solution resists changes in pH when small quantities of acid or base are added. O 1 and 2 only O 2 and 3 only O 1 and 3 only All of 1, 2, and 3 O None of these responses åpply.