Malin just discovered a new protein, Malinase and for it not to unfold and loseits function, he realized that the protein needs to be constantly immersed in a pH = 11.90solution. He is therefore interested in preparing a 50.0 mL 0.080 M pH = 11.90 buffer tocontain the protein.He listed down the acid solutions available to his disposal, and also looked for their aciddissociation constant (Ka) values.ACID2.00 M NITROUS ACID (HNO:)2.00 M ACETIC ACID (CH,COOH)2.00 M ASCORBIC ACID (H:Asc)Ka:4.00 x 10N/A1.76 x 105N/A7.90 x 10 1.60 x 102KazКазN/AN/AN/A2.00 M PHOSPHORIC ACID (H:PO4) 7.52 x 10 6.23 x 10 4.28 x 103A.Identify which weak acid system is best to use in preparing the buffer? Why?В.Identify the species which will make up the buffer system?C.prepare the buffer. Calculate the amount (in mmoles) of each of the components necessary toD.Indicate how Malin is supposed to prepare the buffer from 2.00 M of theacid and/or 4.00 M N2OH.E.Calculate the resulting pH if 5 drops (1 ml = 20 drops) 0.500 M HCI wasaccidentally added to the buffer.

Given the required pH of the buffer solution = 11.90 Volume of the buffer required = 50.0 mL Total…

Malin just discovered a new protein, Malinase and for it not to unfold and lose its function, he realized that the protein needs to be constantly immersed in a pH = 11.90 solution. He is therefore interested in preparing a 50.0 mL 0.080 M pH = 11.90 buffer to contain the protein. He listed down the acid solutions available to his disposal, and also looked for their acid dissociation constant (Ka) values. ACID Ка Каз Кa N/A N/A 4.00 x 10* 2.00 M NITROUS ACID (HNO:) 2.00 M ACETIC ACID (CH,COOH) 2.00 M ASCORBIC ACID (H;Asc) 2.00 M PHOSPHORIC ACID (H;POA) 7.52 x 10 6.23 x 10 4.28 x 103 N/A 1.76 x 10 N/A 7.90 x 10 1.60 x 102 N/A A. Identify which weak acid system is best to use in preparing the buffer? Why? В. Identify the species which will make up the buffer system? C. prepare the buffer Calculate the amount (in mmoles) of each of the components necessary to D. Indicate how Malin is supposed to prepare the buffer from 2.00 M of the acid and/or 4.00 M N2OH. E. Calculate the resulting pH if 5 drops (1 ml = 20 drops) 0.500 M HCI was accidentally added to the buffer.

Malin just discovered a new protein, Malinase and for it not to unfold and lose its function, he realized that the protein needs to be constantly immersed in a pH = 11.90 solution. He is therefore interested in preparing a 50.0 mL 0.080 M pH = 11.90 buffer to contain the protein. He listed down the acid solutions available to his disposal, and also looked for their acid dissociation constant (Ka) values. ACID Ка Каз Кa N/A N/A 4.00 x 10* 2.00 M NITROUS ACID (HNO:) 2.00 M ACETIC ACID (CH,COOH) 2.00 M ASCORBIC ACID (H;Asc) 2.00 M PHOSPHORIC ACID (H;POA) 7.52 x 10 6.23 x 10 4.28 x 103 N/A 1.76 x 10 N/A 7.90 x 10 1.60 x 102 N/A A. Identify which weak acid system is best to use in preparing the buffer? Why? В. Identify the species which will make up the buffer system? C. prepare the buffer Calculate the amount (in mmoles) of each of the components necessary to D. Indicate how Malin is supposed to prepare the buffer from 2.00 M of the acid and/or 4.00 M N2OH. E. Calculate the resulting pH if 5 drops (1 ml = 20 drops) 0.500 M HCI was accidentally added to the buffer.

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter8: Polyfunctional Acids And Bases

Section: Chapter Questions

Problem 14P

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