A Review | Constants Period You may want to reference (Pages 314 -318) Section 10.10 while completing this problem. Part A What is the pH of a buffer system that contains 0.220 Mhydrocyanic acid (HCN) and 0.150 M sodium cyanide (NaCN)? The pK, of hydrocyanic acid is 9.31. Express your answer using two decimal places. ? pH = Submit Request Answer < Return to Assignment Provide Feedback P Pearson

A Review | Constants Period You may want to reference (Pages 314 -318) Section 10.10 while completing this problem. Part A What is the pH of a buffer system that contains 0.220 Mhydrocyanic acid (HCN) and 0.150 M sodium cyanide (NaCN)? The pK, of hydrocyanic acid is 9.31. Express your answer using two decimal places. ? pH = Submit Request Answer < Return to Assignment Provide Feedback P Pearson

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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Please give answer of the question-F accurate and exact with detailed and complete reasons it must be detailed solution please. I'll rate. Thanks (Only last part-F) detailed solution please
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Styles 2. Use a 100-mL beaker to make a 50 ml of the sodium acetate (NaA)/acetate (HA) buffer solution, as shown in the table. Measure and record the pH. Pipette 25 ml of this buffer solution and place it in a new 50-ml beaker. Add 1 ml of 1 M HCI or 1 M NAOH to each separate beaker and mix well. Measure and record pH. Table 2: Buffered solution (acetate) Calculated pH Measured pH 25 mL 1.0 M NaAc + 25 ml 1.0M HA 4.23 4.12 25 ml above mix buffer +1 ml 1.0 M HCI 4.22 25 ml above mix buffer + 1 ml 1.0 M NAOH D, Focus * The pka of acetic acid is 4.75.
Buffer C: 100.0 mL at pH= 12.000, [conj.base] = 0.500 M conjugate acid: HPO4 ^2- conjugate base: PO4 ^3- require concentration (in M) =1.05 mass of solid necessary as source of conjugate acid: 14.9 g
Part A Review Constants | Periodic Table Learning Goal: To understand how buffers use reserves of conjugate acid and conjugate base to counteract the effects of acid or base addition on pH. A buffer is a mixture of a conjugate acid-base pair. In other words, it is a solution that contains a weak acid and its conjugate base, or a weak base and its conjugate acid. For example, an acetic acid buffer consists of acetic acid, CH3COOH, and its conjugate base, the acetate ion CH3COO. Because ions cannot simply be added to a solution, the conjugate base is added in a salt form (e.g., sodium acetate NaCH, COO). Buffers work because the conjugate acid-base pair work together to neutralize the addition of H+ or OH ions. Thus, for example, if H+ ions are added to the acetate buffer described above, they will be largely removed from solution by the reaction of H+ with the conjugate base: H++ CH3COO→CH3COOH Similarly, any added OH ions will be neutralized by a reaction with the conjugate acid: OH +…
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Ok, so the system I am using for my homework said that my answer is wrong. This is the second time I asked a follow-up question in hopes I would get the corrected answer. The first follow-up question is still being reviewed. So I have attached what they said was wrong to this question in hopes that it might help solve the whole equation. Thank you
all 3 parts please
Given for nos. 10-11: In an acid-base titration, you were given with a 0.1050 M sodium hydroxide solution placed in a buret and is needed to neutralize 20.0 mL of 0.1500 M sulfuric acid. 10. How much moles of sulfuric acid is found in the 20.0 mL solution of a 0.15M H2SO4? Answer: Computation: 11. What volume of 0.1050 M sodium hydroxide solution is needed to neutralize 20.0 mL of 0.1500 M sulfuric acid? Answer: Computation: 12. Draw and label a complete laboratory set-up of acid-base titration using phenolphthalein as the indicator, using HCl as the analyte/sample, and using NaOH as the standard solution. Cite complete source/(s) if picture will be copied from the internet.
Solve correctly please , need both subparts to be solve.