A chemist has a compound that contains sodium, phosphorus, and oxygen. She heats 5.00 grams of the compound, leaving only 3.38 grams sodium phosphide (the oxygen was released by the heating). Of the remaining sodium phosphide, 1.05 grams is phosphorus. Give the empirical formula and name of the original compound.
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Explanation:
Trisodium phosphate (TSP) is the inorganic compound with the chemical formula Na3PO4. It is a white, granular or crystalline solid, highly soluble in water, producing an alkaline solution. TSP is used as a cleaning agent, builder, lubricant, food additive, stain remover, and degreaser.
The item of commerce is often partially hydrated and may range from anhydrous Na3PO4 to the dodecahydrate Na3PO4 • 12H2O. Most often found in white powder form, it can also be called trisodium orthophosphate or simply sodium phosphate.
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