A student prepares phosphorous acid, H3PO3, by reacting solid phosphorus triiodide with water.
The student needs to obtain 0.250 L of H3PO3 (d = 1.651 g/cm3). The procedure calls for a 45.0% excess of water and a yield of 75.0%. How much phosphorus triiodide should be weighed out? What volume of water (d = 1.00 g/cm3) should be used?
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