Chemistry, 05.11.2020 17:00 emilykmorphew

A mixture is prepared using 27.00 mL of a 0.0729 M weak base (pka=4.623) , 27.00 mL of a 0.0532 M weak acid (pka=3.268) and 1.00 mL of 1.22Ã—10^âˆ’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 0.1289 . The molar absorptivity values for HIn and its deprotonated form Inâˆ’ at 550 nm are 2.26Ã—10^4 M^âˆ’1cm^âˆ’1 and 1.53Ã—10^4 M^âˆ’1cm^âˆ’1 , respectively. (a)- What is the pH of the solution?

(b)- What are the concentration of ln- and Hln?

(c)- What is pKa for Hln?

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A mixture is prepared using 27.00 mL of a 0.0729 M weak base (pka=4.623) , 27.00 mL of a 0.0532 M we...

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