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Unformatted text preview: 10. Citric acid, which is extracted from citrus fruits and pineapples, undergoes three successive deprotonations with pKa values of 3.14, 5.95, and 6.39. Estimate the pH of (a) a 0.15 M aqueous solution of the monosodium salt and (b) a 0.075 M aqueous solution of the disodium salt. 11. A large volume of 0.150 M H 2 SO 3 (aq) is treated with a solid, strong base to adjust the pH to 5.50. Assume that the addition of the base does not significantly affect the volume of the solution. Estimate the concentrations of H 2 SO 3 , HSO 3, and SO 3 2present in the final solution. 12. Calculate the pH of 0.015 M H 3 PO 4 (aq), ignoring the second deprotonation only if justified. 13. Compute the concentration of the phosphate species in a H 3 PO 4 solution that has pH = 2.25, if the total concentration of all four forms of the dissolved phosphates is 1.5 x 102 molL1 ....
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This note was uploaded on 03/01/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.
 Spring '07
 Holcombe
 Proton, Bases, pH

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