Question

Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 3.3 - 3.4? NaOCl / HOCl (Ka = 3.2 × 10??) CH?COONa / CH?COOH (Ka = 1.8 × 10??) NaCl / HCl none of these NH? / NH?Cl (Ka = 5.6 × 10?¹?) NaNO? / HNO? (Ka = 4.5 × 10??)

          Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 3.3 - 3.4?

NaOCl / HOCl (Ka = 3.2 × 10??)
CH?COONa / CH?COOH (Ka = 1.8 × 10??)
NaCl / HCl
none of these
NH? / NH?Cl (Ka = 5.6 × 10?¹?)
NaNO? / HNO? (Ka = 4.5 × 10??)

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Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 3.3 - 3.4?

NaOCl / HOCl (Ka = 3.2 × 10??)
CH?COONa / CH?COOH (Ka = 1.8 × 10??)
NaCl / HCl
none of these
NH? / NH?Cl (Ka = 5.6 × 10?¹?)
NaNO? / HNO? (Ka = 4.5 × 10??)

Added by Kevin P.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Madhur L

07/21/2023

Step 1

We are given that the desired pH is 3.3 - 3.4, and we are also given that the concentrations of the conjugate base and acid are equal, which means that the ratio [A-]/[HA] is 1. Therefore, the equation simplifies to: pH = pKa Now, we need to find the pKa values Show more…

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Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 3.3-3.4? NaOCl / HOCl (Ka = 3.2 * 10^-8) CH3COONa / CH3COOH (Ka = 1.8 x 10^-5) NaCl / HCl none of these NH3 / NH4Cl (Ka = 5.6 * 10^-10) NaNO2 / HNO2 (Ka = 4.5 x 10^-4)

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