Which of the following mixtures is suitable for making a buffer solution with the optimum pH of 9.2-9.3? The Ka values are given. HCOOH / HCOO- - 1.8 x 10-4 C5H5N/ C5H5NH+ - 6.7 x 10-6 NO2- / HNO2 - 4.5 x 10-4 NH3 / NH4+ - 5.6x 10-10 HCN / CN- - 4.0 x 10-10
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A buffer solution is a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. It resists changes in pH when small amounts of acid or base are added. 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 9.2-9.3? CH3COONa / CH3COOH (Ka = 1.8 * 10^-5) NH3 / NH4Cl (Ka = 5.6 x 10^-10) NaOCl / HOCl (Ka = 3.2 * 10^-8) NaNO2 / HNO2 (Ka = 4.5 * 10^-4)
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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 9.2-9.3? Select one: NaCl/HCl NaNO2/HNO2 (Ka = 4.5×10−4) CH3COOH/CH3COONa (Ka = 1.8×10−5) NaOCl/HOCl (Ka = 3.2×10−8) NH3/NH4Cl (Ka = 5.6×10−10)
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Which of the following acids will be best suitable for preparing a buffer solution with pH = 6.2 HCN, Ka = 6.2 x 10-10 HNO2, Ka = 7.2 x 10-4 H2CO3, Ka = 4.4 x 10-7 CH3COOH, Ka = 1.8 x 10-5
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