A series of solutions containing NaOH, Na3AsO4, and Na2HAsO4, alone or in
compatible combination, was titrated with 0.08601 M HCl. Tabulated below are the volumes of acid
needed to titrate 25.00-mL portions of each solution to (1) a phenolphthalein and (2) a bromocresol
green end point. Use this information to deduce the composition of the solutions. In addition, calculate
the mass in milligrams of each solute per milliliter of solution.
(1) | (2) |
(a) 0.00 | 18.15 |
(b) 21.00 | 28.15 |
(c) 19.80 | 39.61 |
(d) 18.04 | 18.03 |
(e) 16.00 | 37.37 |
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