4) If you were to have a graph of a 23.5 mL of a weak acid (HA) is titrated with a strong base 0.20M KOH. On the graph, the initial pH reads 3.12, there is a large vertical jump at 11.2 mL of KOH added. a. How would you determine the initial concentration of the acid HA before any base was added? i. Determine the concentration of acid. b. How would you determine the concentration of hydrogen ions in solution before any base is added? i. Calculate this value. c. How would you calculate the Ka from the two values you just found above? Do this.

4) If you were to have a graph of a 23.5 mL of a weak acid (HA) is titrated with a strong base 0.20M KOH. On the graph, the initial pH reads 3.12, there is a large vertical jump at 11.2 mL of KOH added. a. How would you determine the initial concentration of the acid HA before any base was added? i. Determine the concentration of acid. b. How would you determine the concentration of hydrogen ions in solution before any base is added? i. Calculate this value. c. How would you calculate the Ka from the two values you just found above? Do this.

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...

See similar textbooks

Similar questions

a) In a NaOH and HCl titration lab: Suppose you add 40 ml of water instead of the 45 mL. How will this affect the calculations for the molarity of the HCI? (In this case, the molarity of HCl turned out to be 0.559 mol/L). While being specific. Explain why it will not matter or it will make the molarity high or it will make the molarity low. b) if you disregard the instructions to titrate until a persistent blue endpoint is reached and instead conclude the titration at the initial appearance of blue, describe the impact on the reported molarity of the CoC12 solution. Provide specific details and specify whether the reported molarity will be higher, lower, or remain unaffected.
HCL Solution-- 20 mL HCl with 25.46 mL of 0.1240 M NaOH
Answer Questions #27 through #31 about the titration curves below (labeled a and b) for two different bases. The titrant acid used in both cases was 0.100 M HCl and the volume of the base solutions in both cases was 75.0 mL mL. 14 14 12 12 - 10- 10 8- 6. 4. 2- 2- 20 40 60 80 100 20 40 60 80 100 Volume of acid added (mL) (a) (b) Volume of acid added (mL) 2014 Pearson Education Inc P Type here to search 11:17 AM (? 3/18/2021 -> ort sc 80 6. ece num ER/TY || на 0 04 2C Hd
14 Given the hypothetical titration curves below, determine what curve has a stronger acid. 14 a. b. C. d. 12 10 8 6 4 () 0 Curve A Curve B Curve C Cannot be determined A B and C 10 20 30 40 50 60 Volume of 0.1000 M NaOH, mL
Q4. In this experiment, we add hydrochloric acid to our unknown sodium hydroxide solution during the titration. Sketch a sample pH curve showing how the pH of the titrated solution changes as we add more titrant. Be sure to label both axes of your graph and indicate the position of the equivalence point. C10 p Con Q5 You initially begin with a 0.1593 M hydrochloric acid solution. If you had a 125.0 mL sample of this hydrochloric acid solution, how many grams of HCl would be present in the sample? Show all work. Yourde tobl Q6 Write out a stepwise procedure (list of numbered steps) that you plan to execute when you come to lab to do the titration. (You instructor will review and offer feedback in person; you must have a written procedure before you can start the in-person portion of the final). You can assume you have access to the following equipment: buret/ring stand and buret clamp 25 mL graduated cylinder pipet pump 150 mL beaker (for waste) distilled water 50 mL buret 125 mL…
35
A flask contains 0.015 mol of HCl in 10.0mL of solution. a. What is the molarity of the HCl solution? b. In a titration with NaOH, how many moles of NaOH will be required to reach the end point? c. If 12.5 mL of NaOH are required to reach the end point, what is the molarity of the NaOH solution?