To prepare the buffer in the previous problem, a total volume of 500 mL is required. The stock solution of the weak base is available at 1 gallon with a concentration of 0.99 M. (Remember the lesson on dilution: M1V1=M2V2)4. How many mL should be taken from the stock solution to prepare the desired buffer solution? (Write your answer in 3 decimal places without the unit). PREVIOUS PROBLEM: Using the table of the weak base below, you have chosen Ethylamine as your weak base inthe buffer solution. You have already added enough of the conjugate acid salt to make thebuffer solution concentration at 0.52 M in this salt. The desired pH of the buffer should beequal to 10.1.Values of K, for Some Common Weak BasesConjugateAcidNameFormulaKpNH3CH;NH2C2H§NH2C,H;NH2C;H;NNH,+CH;NH3*CH3NH3*CH;NH;*C;H;NH+Ammonia1.8 × 10-5MethylamineEthylamineAniline4.38 × 10-45.6 × 10-43.8 × 10-101.7 × 10-9Pyridine

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Answered: To prepare the buffer in the previous…

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria

Section17.2: Controlling Ph: Buffer Solutions

Problem 4CYU: Calculate the pH of 0.500 L of a buffer solution composed of 0.50 M formic acid (HCO2H) and 0.70 M...

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To prepare the buffer in the previous problem, a total volume of 500 mL is required. The stock solution of the weak base is available at 1 gallon with a concentration of 0.99 M. (Remember the lesson on dilution: M1V1=M2V2)

4. How many mL should be taken from the stock solution to prepare the desired buffer solution? (Write your answer in 3 decimal places without the unit).

PREVIOUS PROBLEM:

Using the table of the weak base below, you have chosen Ethylamine as your weak base in
the buffer solution. You have already added enough of the conjugate acid salt to make the
buffer solution concentration at 0.52 M in this salt. The desired pH of the buffer should be
equal to 10.1.
Values of K, for Some Common Weak Bases
Conjugate
Acid
Name
Formula
Kp
NH3
CH;NH2
C2H§NH2
C,H;NH2
C;H;N
NH,+
CH;NH3*
CH3NH3*
CH;NH;*
C;H;NH+
Ammonia
1.8 × 10-5
Methylamine
Ethylamine
Aniline
4.38 × 10-4
5.6 × 10-4
3.8 × 10-10
1.7 × 10-9
Pyridine

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to prepare the buffer in the previous problem, a total volume of 500 mL is required. The stock solution of the weak base is available at 1 gallon with a concentration of 0.45 M. (Remember the lesson on dilution: M1V1=M2V2)

4. How many mL should be taken from the stock solution to prepare the desired buffer solution? (Write your answer in 2 decimal places without the unit).

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