**Buffer Preparation Exercise**A student needs to prepare a buffer made from HCN and NaCN with a pH of 9.681. If the $ K_a $ for HCN is $ 4.00 \times 10^{-10} $, what ratio of $[\text{HCN}]$ to $[\text{CN}^-]$ is required?\[\frac{[\text{HCN}]}{[\text{CN}^-]} = \, \text{(Enter ratio in the box provided)}\]**Submission Options:**- Submit Answer- Retry Entire GroupNote: 9 more group attempts remaining**Navigation:**- Previous- Next**Technical Support:**For technical issues, access Cengage Learning | Cengage Technical Support.---This content is designed for students learning about buffer systems and is part of an interactive platform to test their knowledge on the subject.

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eq req Ⓡ 2req #3 A student needs to prepare a buffer made from HCN and NaCN with pH 9.681. If K, for HCN is 4.00 x 10-10, what [HCN] Is required? ON ratio of [HCN] [ON] 20 E C Submit Answer $ 4 R F Retry Entire Group 9 more group attempts remaining % 5 Cengage Learning Cengage Technical Support FS T G ^ 6 MacBook Air P F6 Y H & 7 14 U ㄴ * 0 8 ➤ll F8 I 9 K ▶ F9 O ) 0 L A P 4) F11 Previous + Next> Save and Exit 4) $12 1 delete 1

eq req Ⓡ 2req #3 A student needs to prepare a buffer made from HCN and NaCN with pH 9.681. If K, for HCN is 4.00 x 10-10, what [HCN] Is required? ON ratio of [HCN] [ON] 20 E C Submit Answer $ 4 R F Retry Entire Group 9 more group attempts remaining % 5 Cengage Learning Cengage Technical Support FS T G ^ 6 MacBook Air P F6 Y H & 7 14 U ㄴ * 0 8 ➤ll F8 I 9 K ▶ F9 O ) 0 L A P 4) F11 Previous + Next> Save and Exit 4) $12 1 delete 1

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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I need to answer this in 4 mins. Can you help me out please.!!!! What NaHS needs to be added to 0.015 M H2S to obtain a buffer solution with a pH of 5.3?
#4 Could you circle or make answer visible please.
[References] SIMULATION Buffer Solutions 7 7 0. 14 0- 14 0. 14 7.00 7.00 4.74 Reset All 1.0 M HCI 1.0 M NAOH 1.0 M HCI 1.0 M NAOH 1.0 M HCI 1.0 M NAOH Add Add Add Add Add Add 10. mL 10. mL 10. mL 10. mL 10. mL 10. mL Initial Solution 100 mL Initial Solution Initial Solution 100 mL 100 mL 1.0 M CH3CO,H(aq) 1.0 M NACH,CO,(aq) H,0 1.0 M NaCl What is the pH of water after the addition of 10 mL of 1.0 M HC1? Recheck (2 of 5) 7th attempt Incorrect The pH is given above the beaker.
Pls help ASAP on both
Q5
Pls help ASAP
Calculate the ratio of CH3NH2 to CH3NH3C1 required to create a buffer with pH = 10.18. %3D Express your answer to two significant figures. View Available Hint(s) V AEO [CH3NH2] [CH3NH3 Cl]
help with part b please