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A mixture is prepared using 25.00 mL of a 0.0773 M weak base (pK, = 4.586), 25.00 mL of a 0.0564 M weak acid (pK₁ 3.209)
Posted: Fri May 06, 2022 8:36 am
by answerhappygod
- A Mixture Is Prepared Using 25 00 Ml Of A 0 0773 M Weak Base Pk 4 586 25 00 Ml Of A 0 0564 M Weak Acid Pk 3 209 1 (38.89 KiB) Viewed 24 times
- A Mixture Is Prepared Using 25 00 Ml Of A 0 0773 M Weak Base Pk 4 586 25 00 Ml Of A 0 0564 M Weak Acid Pk 3 209 2 (38.89 KiB) Viewed 24 times
A mixture is prepared using 25.00 mL of a 0.0773 M weak base (pK, = 4.586), 25.00 mL of a 0.0564 M weak acid (pK₁ 3.209) and 1.00 mL of 1.25 x 10-4 M HIn and then diluting to 100.0 mL, where HIn is the protonated indicator. The absorbance measured at 550 nm in a 5.000 cm cell was 0.1230. The molar absorptivity (e) values for HIn and its deprotonated form In at 550 nm are 2.26 x 104 M-¹cm¹ and 1.53 x 10 M¹cm¹, respectively. What is the pH of the solution? 3.85 x10-10 pH = Incorrect What are the concentrations of In and Hin? 6.2 X10-4 = M Incorrect [Hin] Incorrect What is the pK, for Hin? M