Chemistry: An Atoms-Focused Approach
14th Edition
ISBN: 9780393912340
Author: Thomas R. Gilbert, Rein V. Kirss, Natalie Foster
Publisher: W. W. Norton & Company
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Do all titrations of a strong base with a
strong add have the same PH at the
equivalence point?
Why does the titration of a weak acid with a strong base always have a basic equivalence point?
In the titration of a strong acid (the analyte) with a strong base (the titrant), what type of pH problem must be solved if the titration is stopped at any point after the equivalence point?
Chapter 15 Solutions
Chemistry: An Atoms-Focused Approach
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- Consider the nanoscale-level representations for Question 110 of the titration of the aqueous weak acid HX with aqueous NaOH, the titrant. Water molecules and Na+ ions are omitted for clarity. Which diagram corresponds to the situation: After a very small volume of titrant has been added to the initial HX solution? When enough titrant has been added to take the solution just past the equivalence point? Halfway to the equivalence point? At the equivalence point? Nanoscale representations for Question 110.arrow_forwardEach of the solutions in the table has the same volume and the same concentration, 0.1 M. Which solution requires the greatest volume of 0.1-M NaOH to titrate to the equivalence point? Explain your answer.arrow_forwardA buffer is prepared using the butyric acid/butyrate (HC4H7O2/C4H7O2)acid-base pair. The ratio of acid to base is 2.2 and Ka for butyric acid is1.54105. (a) What is the pH of this buffer? (b) Enough strong base is added to convert 15% of butyric acid to the butyrate ion. What is the pH of the resulting solution? (c) Strong acid is added to the buffer to increase its pH. What must the acid/base ratio be so that the pH increases by exactly one unit (e.g., from 2 to 3) from the answer in (a)?arrow_forward
- Describe at least two ways that the solubility of a sparingly soluble metal hydroxide can be changed.arrow_forwardConsider a monoprotic weak acid (HA) that is titrated with a strong base. What is the relationship between the strength of the weak acid and the pH of the solution at the equivalence point? O The stronger the acid, the higher the pH at the equivalence point. The weaker the acid, the higher the pH at the equivalence point. O There is no relationship between the strength of the acid and the pH at the equivalence point. The pH at the equivalence point is always 7 in an acid-base titration.arrow_forwardConsider the titration of a weak acid with a strong base at the equivalence point. Choose all true statements that apply. The moles of weak acid and its conjugate base are equal in the solution. The moles of weak acid originally in the solution is equal to the moles of strong base added. The pH is equal to the pKa of the acid. All of the weak acid originally present in the solution has been converted into its conjugate base.arrow_forward
- The graph shows the titrations of two unknown acids with the same base. Identify the stronger acid and the weaker acid. Support your identifications by estimating the K, of each acid. Unknown acid A 13.0 Unknown acid B 12.0 11.0 10.0 9.0 8.0 품 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 Volume of added base (mL)arrow_forwardA solution of a weak acid is titrated with a standard solution of a strong base. The progress of the titration is followed with a pH meter. Which of the following observations best describes what would occur? Initially the pH of the solution increases slowly, and then it increases much more rapidly, before increasing slowly again At the equivalence point, the pH is 7 The pH of the solution gradually decreases throughout the experiment After the equivalence point, the pH becomes constant because this is the bufferarrow_forwardUsing suitable curves explain the variations in titration curves obtained between the titration of a strong acid with a strong base and the titration of weak acid with a strong base.arrow_forward
- Which statement is not true when describing acid-base titration curve? in a weak acid - strong base tittration curve, there is a buffer region before the equivalence point in a strong base - strong acid titration, the initial pH of the solution has a very high pH in any titration set-up that uses a strong base as a titrant, after the equivalence point the solution becomes more acidic in a strong base - strong acid titration, the equivalence point is at pH = 7.00arrow_forwarddraw a general titration curve for titrating a weak base with a strong acid (Let the pH at the equivalence point be 4.00)arrow_forwardDraw the titration curves for the titrations of (a) a strong acid with a strong base, (b) a strong acid with a weak base, (c) a weak acid with a strong base and (d) a weak acid with a weak base. Make sure you label each of them properly (volume on x-axis and pH on the y-axis). Describe how you would determine the Ka for a weak acid from the titration curves.arrow_forward
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Acid-Base Titration | Acids, Bases & Alkalis | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=yFqx6_Y6c2M;License: Standard YouTube License, CC-BY