A series of solutions containing NaOH, Na₃AsO₄, and Na₂HAsO₄, alone or in compatible combination, was titrated with 0.08601 M HCl. In the following table 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.

Transcribed Image Text:

(1) (a) 0.00 (b) 21.00 (c) 19.80 (d) 18.04 (e) 16.00 (2) 18.15 28.15 39.61 18.03 37.37