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23 Nov 2019

Which of the following combinations would be the best choice in order to prepare a buffer with a pH of 10?

A. Oxalic acid dihydrate/sodium oxalate

B. Formic acid/sodium formate

C. Acetic acid/sodium acetate

D. Sodium carbonate/ sodium bicarbonate

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Lelia Lubowitz
Lelia LubowitzLv2
2 Jan 2019

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Related questions

What is the suitable acid/base pair to prepare a buffer with a pH of 3.4

A formic acid/sodium formate
B mandelic acid/sodium mandelate
C maleic acid/sodium maleate
D hydrochloric acid/sodium hydroxide

How would you prepare 250 mL if a .20 M formate buffer with a pH of 4.0 using formic acid (HCH02) and sodium formate (NaCHO2)? formic acid pka= 3.8

Ans: 1.38 g formic acid + 1.36 g NaCHO2

How Would you prepare the buffer above using just sodium formate?

Ans: 3.4 g

How did they get these answers?!?! please explain...

You need to make a formic acid buffer with a pH of 4.14, and you have a stock solution of 0.682 M formic acid. What concentration (M) of the conjugate base salt, sodium formate, must you use in the buffer?
Formic Acid (HCOOH) Ka = 1.8 x 10^-4
Sodium salt = NaHCOO

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