A biology experiment requires the use of a nutrient fluid buffered at a pH of 4.85, and 659 mL of the solution is needed. It has to be buffered to be able to hold the pH to within +0.10 pH units of 4.85 even if 5.00 x 103 mol of OH" or 5.00 x 103 mol of H* ion enter. Record all your answers to three (3) significant figures. Pick the best acid and its sodium salt that could be used to prepare the solution. O Hydrocyanic acid and sodium cyanide (pK = 9.21). O Nitrous acid and sodium nitrite (pK, = 3.15). • Acetic acid and sodium acetate (pK, = 4.74). O Hydrofluoric acid and sodium fluoride (pK, = 3.17). Hint Calculate the minimum number of grams of the acid and its sodium salt that are needed to prepare the buffer solution. Mass acid = Mass sodium salt = Hint Calculate the molar concentration of the acid and its sodium salt that are needed to prepare the buffer solution. Concentration acid = M Concentration sodium salt = M Hint
A biology experiment requires the use of a nutrient fluid buffered at a pH of 4.85, and 659 mL of the solution is needed. It has to be buffered to be able to hold the pH to within +0.10 pH units of 4.85 even if 5.00 x 103 mol of OH" or 5.00 x 103 mol of H* ion enter. Record all your answers to three (3) significant figures. Pick the best acid and its sodium salt that could be used to prepare the solution. O Hydrocyanic acid and sodium cyanide (pK = 9.21). O Nitrous acid and sodium nitrite (pK, = 3.15). • Acetic acid and sodium acetate (pK, = 4.74). O Hydrofluoric acid and sodium fluoride (pK, = 3.17). Hint Calculate the minimum number of grams of the acid and its sodium salt that are needed to prepare the buffer solution. Mass acid = Mass sodium salt = Hint Calculate the molar concentration of the acid and its sodium salt that are needed to prepare the buffer solution. Concentration acid = M Concentration sodium salt = M Hint
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter3: Chemical Reactions
Section: Chapter Questions
Problem 137QRT
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![A biology experiment requires the use of a nutrient fluid buffered at a pH of 4.85, and 659 mL of the solution is needed. It has to be
buffered to be able to hold the pH to within =0.10 pH units of 4.85 even if 5.00 x 10 mol of OH or 5.00 x 10 mol of H* ion enter.
Record all your answers to three (3) significant figures.
Pick the best acid and its sodium salt that could be used to prepare the solution.
O Hydrocyanic acid and sodium cyanide (pK, = 9.21).
O Nitrous acid and sodium nitrite (pk, = 3.15).
Acetic acid and sodium acetate (pK, = 4.74).
O Hydrofluoric acid and sodium fluoride (pK, = 3.17).
Hint
Calculate the minimum number of grams of the acid and its sodium salt that are needed to prepare the buffer solution.
Mass acid i
Mass sodium salt = i
Hint
Calculate the molar concentration of the acid and its sodium salt that are needed to prepare the buffer solution.
Concentration acid =
M
Concentration sodium salt =
M
Hint
on](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe225bb08-229e-4468-8b56-f3e7c636855e%2F20c88075-56a4-46f1-aef6-f8e745612958%2Fs2s9pb8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A biology experiment requires the use of a nutrient fluid buffered at a pH of 4.85, and 659 mL of the solution is needed. It has to be
buffered to be able to hold the pH to within =0.10 pH units of 4.85 even if 5.00 x 10 mol of OH or 5.00 x 10 mol of H* ion enter.
Record all your answers to three (3) significant figures.
Pick the best acid and its sodium salt that could be used to prepare the solution.
O Hydrocyanic acid and sodium cyanide (pK, = 9.21).
O Nitrous acid and sodium nitrite (pk, = 3.15).
Acetic acid and sodium acetate (pK, = 4.74).
O Hydrofluoric acid and sodium fluoride (pK, = 3.17).
Hint
Calculate the minimum number of grams of the acid and its sodium salt that are needed to prepare the buffer solution.
Mass acid i
Mass sodium salt = i
Hint
Calculate the molar concentration of the acid and its sodium salt that are needed to prepare the buffer solution.
Concentration acid =
M
Concentration sodium salt =
M
Hint
on
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