Which of the following statement is incorrect regarding buffer solutions: O Buffer solutions are prepared from a weak conjugate acid/base pair O Maximum buffer capacity is achieved when pH= pKa O The pH of buffer solutions are dependent of dilution O Buffer capacity correlates with one pH unit change Buffer solutions resist change in pH upon adding small amounts of a strong acid or a strong base

Which of the following statement is incorrect regarding buffer solutions: O Buffer solutions are prepared from a weak conjugate acid/base pair O Maximum buffer capacity is achieved when pH= pKa O The pH of buffer solutions are dependent of dilution O Buffer capacity correlates with one pH unit change Buffer solutions resist change in pH upon adding small amounts of a strong acid or a strong base

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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Which of the following solutions is a good buffer system? A) a solution thats is 0.10 M HNO2 and 0.10 M NaNO2 B) a solution that is 0.10 M NaOH and 0.10 M HNO3 C) a solution that is 0.10 M NaCl and 0.10 M HCI D) a solution that us 0.10 M HCN and 0.10 M HCI
A 34.8 mL aliquot of weak acid that has a concentration of 0.752 M will be titrated with 0.853 M NaOH. Calculate the pH of of the solution upon the addition of 0 mL of HCl. The Ka of the acid is 7.5×10-6. A 36.54 mL aliquot of weak acid that has a concentration of 0.255 M will be titrated with 0.981 M NaOH. Calculate the pH of of the solution upon the addition of 40.11 mL of NaOH. The Kb of the base is 7.9 × 10-7.
Which combination would be preferable to form a buffer? OWeak acid and its conjugate base Weak acid and its conjugate acid Strong acid and a strong base Weak acid and a weak base Strong acid and its conjugate base
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
Buffer solutions produce large changes in pH upon addition of small amounts of strong acid or strong base. Group of answer choices True False
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Which of the following solutions can act as a buffer? HCI and NACI NaCl and H2O NaOH and HCI NH3 and NH,CI
The amount of acid or base the buffer can neutralize before the pH begins to change to an appreciable degree Buffer Buffer capacity Buffer equation Henderson-Hasselbalch
Equal volumes of the following pairs of solutions are mixed. Which pair will produce a buffer solution? 0.10 M HCl and 0.15 M NH3 0.10 M HCl and 0.20 M CH3COOH 0.10 M HCl and 0.05 M NaOH 0.10 M HCl and 0.20 M NaCl 0.10 M HCl and 0.05 M NH3
Buffers usually are composed of: Weak acids and conjugate bases Weak acids and weak bases Weak acids and conjugate acids 98. Which of the following leads to an overall decrease in energy of a system? Freezing Sublimation Melting Vaporization
Give the components of a buffer system and explain the requirements for a solution to be considered a buffer.
What information can be obtained by examining the titration curve of a weak acid the concentration of the base solution O the initial pH of the acid O the identity of the salt formed by the neutralization reaciton O the heat of formation of the acid