5. A certain barium halide exists as the hydrated salt BaX₂.2H₂O, where X is the halogen. The barium content of the salt

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5 A Certain Barium Halide Exists As The Hydrated Salt Bax 2h O Where X Is The Halogen The Barium Content Of The Salt 1 (29.67 KiB) Viewed 14 times

5. A certain barium halide exists as the hydrated salt BaX₂.2H₂O, where X is the halogen. The barium content of the salt can be determined by gravimetric methods. A sample of the halide (0.2650 g) was dissolved in water (200 cm) and excess sulfuric acid added. The mixture was then heated and held at boiling for 45 minutes. The precipitate BaSO4 (barium sulfate FM 233.40 g/mol)) was filtered off, washed and dried. Mass of precipitate obtained = 0.2533 g. Determine the identity of X. (x=CI) BaX₂.2H₂O sample=0.2650 g Volume = 200 ml BaSO4= 0.2533 g BaX2.2H₂O 0.2650 g BaSO4 Mass BaSO4 0.2533 g Moles BaSO4 = mass / MM Mole BaSO4 = 0.2533 g/233.40 g/mol = 1.0853 x 10³ mol