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Chemistry

Chemistry Question

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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Consider Titration of 25 mL of .1 M CH3CO2H With .1 M NaOH. Calculate The pH After Adding The Following Volumes of NaOH: a. 0 mL b. 12.5 mL c. 20 mL d. 25 mL e. 37.5 mL I do know the correct answers, I just don't how to get to the answers. a. pH = 2.87 b. pH = 4.74 c. pH = 5.34 d. pH = 8.72 e. pOH = -log (0.0192 M) = 1.72 14 - 1.72 = 12.28 (I been having a hard time people getting the correct answer for part e, people keep getting 12.30 as the answer, but it is not. The correct answer is 12.28. I only remember how to do the last steps to get part e answer, which is 12.28, as it can be seen).
P5
5. Consider a titration between 25.0 mL of 0.100 M sodium hydroxide, NaOH and 0.050 M hydrochloric acid, HCI. a. Determine pH of the base before titration begins. b. Find pH of the solution in flask after 10.0 mL of acid has been added. c. Calculate the volume of acid added at the equivalence point. d. Show that the pH of solution in flask is 2.23 after 60.0 mL acid has been delivered. e. Sketch the titration curve for the titration above f. Name the type of titration. g. Identify the colour change of indicator at equivalence point if phenolphthalein is used.
The titration curve attached was obtained from the titration of a 0.225 g sample of a solid acid with 0.100 M KOH. How many moles of acid are present? 14 12 10 8 6. 4. 2 10 15 20 25 30 Volume of KOH added (mL) A. 0.000800 moles Acid B. 0,00160 moles Acid O C. 0,00110 moles Acid D. 0.00255 moles Acid
12. Which titration curve will result if the titrant is a strong base and the analyte is a strong acid? pH pH. PH pH А. volume of added В. volurme of added С. volume of added D. volume of added
Calculate the pH at each point of a titration where 30.0 ml of 0.25M HC2H3O2 are titrated with the following volumes of 0.15M LiOH. a. 15.0ml b. 25.0ml c. 50.0ml d. 60.0ml
Determine the pH during the titration of 20.6 mL of 0.328 M perchloric acid by 0.206 M barium hydroxide at the following points:a.Before the addition of any barium hydroxide b.After the addition of 8.20 mL of barium hydroxide c. At the equivalence point d. After adding 20.8 mL of barium hydroxide
11. What effect will addition of excess of HCI have on the pH of a solution of NH3? a. increase the pH b. decrease the pH C. no effect d. cannot tell from information given > Answer and brief explanation: 12. A buffer solution may be a mixture of a. a weak acid and its salt b. a weak base and its salt C. an excess of a weak acid with a strong base d. all of the above > Answer and brief explanation: 13. The ammonium ion would be classified as a Bronsted a. acid b. base > Answer and brief explanation:
Which of the following, when mixed, would NOT result in a buffer solution? а. 10 mL of 0.1M HCI and 20 mL of 0.1 M NH3 O b. 10 mL of 0.1 M HCI and 20 mL of 0.1 M NaC2H3O2 C. 10 mL of 0.1 M NaOH and 20 mL of 0.1 M potassium cyanide, KCN d. 10 mL of 0.1 M NaOH and 20 mL 0.1 M HF e. 10 mL of 0.1 M acetic acid, HC2H3O2, and 10 mL of 0.1 M sodium acetate, NaC2H3O2
I need help with 3. Determine the pH of the solution at the equivalence point
Moving to another question will save this response. uestion 5 In the titration of 0.100 M HNO3 with the titrant 0.100 M KOH, what species are present at any point after KOH has been added but before the equivalence point? a. KOH only b. KNOJ only c. HNOJ and KNO d. HNO3 only e. HNO3 and KOH
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