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You have to prepare a pH 3.65 buffer, and you have the following 0.10M solutions available: HCOOH, CH3COOH, H3PO4, HCOONa, CH3COONa and NaH2PO4. How many mL of HCOOH and HCOONa would you use to make approximately a liter of the buffer?

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Lelia Lubowitz
Lelia LubowitzLv2
28 Sep 2019

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Related questions

Determine the volumes of each solution you would use to prepare a 1.0L of a pH 5.00 buffer. Choose solutions from the following list. For the answer, list the solution and the volume of that solution.

0.10 M HCOOH Ka = 1.8 x 10-4

0.10 M HCOONa

0.10 M CH3COOH Ka = 1.8 x 10-5

0.10 M CH3COONa

0.10 M HCN Ka = 4.9 x 10-10

0.10 M NaCN

You need to prepare a solution with pH = 4.50. You have the following 0.15 M solutions available in the laboratory: CH3COOH, CH3COONa. How many milliliters of each solution would you use to make one liter of this buffer solution?

Ka acetic acid = 1.8

You have 1 M solutions of H3PO4, NaH2PO4, Na2HPO4, Na3PO4 (no NaOH).

=> Using only two of these solutions, how would you prepare 150 mL of 1 M phosphate buffer at pH 3.0?

A)

131.4 mL of NaH2PO4 + 18.6 mL H3PO4
B)

50 mL Na2HPO4 + 100 mL Na3PO4
C)

75 mL Na2HPO4 + 75 mL Na3PO4
D)

18.6 mL of NaH2PO4 + 131.4 mL H3PO4

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