The Ka expression for the H, PO,/HPO?- buffer is givenIonic strength (µ, M)0.005 0.010 0.050 | 0.10by the equationYH+0.933 0.914 0.860.83[HPO] YHPO;- [H*] YH*Ka =[H,PO;] YH,PO;YHPO; -0.740 0.660 0.445 0.35510-7.20YH,PO,0.928 0.902 0.82 0.775What is the pH of a 1:1 mixture of H, PO, to HPO?- atan ionic strength of 0.005 M? Activity coefficients can befound in the table.pH6.77

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The Ka expression for the H, PO,/HPO;- buffer is given Ionic strength (µ, M) 0.005 0.010 0.050 0.10 by the equation YH+ 0.933 0.914 0.86 0.83 0.740 0.660| 0.445 0.355 [HPO;] YHPO;- [H*] YH• K, = YHPO - = 10-7.20 [H, PO] YH,PO; YH, PO, 0.928 0.902 0.82 |0.775 What is the pH of a 1:1 mixture of H, PO, to HPO;- at an ionic strength of 0.005 M? Activity coefficients can be found in the table. pH = 6.77

The Ka expression for the H, PO,/HPO;- buffer is given Ionic strength (µ, M) 0.005 0.010 0.050 0.10 by the equation YH+ 0.933 0.914 0.86 0.83 0.740 0.660| 0.445 0.355 [HPO;] YHPO;- [H*] YH• K, = YHPO - = 10-7.20 [H, PO] YH,PO; YH, PO, 0.928 0.902 0.82 |0.775 What is the pH of a 1:1 mixture of H, PO, to HPO;- at an ionic strength of 0.005 M? Activity coefficients can be found in the table. pH = 6.77

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 33QAP: A buffer is prepared in which the ratio [ H2PO4 ]/[ HPO42 ]is 3.0. (a) What is the pH of this...

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