Consider how to prepare a buffer solution with pH = 7.33 (using one of the weak...

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Chemistry

Consider how to prepare a buffer solution with pH =7.33 (using one of the weak acid/conjugate basesystems shown here) by combining 1.00 L of a0.418-M solution of weak acid with0.359 M sodiumhydroxide.
Weak Acid Conjugate Base K_a pK_a
HNO₂
NO₂^-
4.5 x 10^-4
3.35
HClO
ClO^-
3.5 x 10^-8
7.46
HCN
CN^-
4.0 x 10^-10
9.40

How many L of the sodium hydroxide solution wouldhave to be added to the acid solution of your choice?
L

Weak Acid	Conjugate Base	K_a	pK_a
HNO₂	NO₂^-	4.5 x 10^-4	3.35
HClO	ClO^-	3.5 x 10^-8	7.46
HCN	CN^-	4.0 x 10^-10	9.40

Answer & Explanation Solved by verified expert

4.3 Ratings (871 Votes)

First the best buffer will be the one with the pKa value closer to the pH desired In this case for a pH of 733 the pKa of 746 would be the best and the ideal So the system to use will be HClO and See Answer

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