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Barium chloride (BaCl2) is an inexpensive, soluble salt of barium that has wide application in the laboratory, including in the gravimetric determination of the presence of sulfate ions. Solid barium chloride can be produced through the decomposition reaction of solid barium chlorate (Ba(ClO3)2) which also produces oxygen gas. When 7.25 g of barium chlorate decomposes completely, 4.96g of barium chloride is produced.

Write a balanced chemical equation for the decomposition of barium chlorate. (2 marks)

Using your understanding of the conservation of mass, determine how much oxygen is produced. (1 mark)

If 5.00g of barium chlorate was used instead, how much more barium chlorate would be required to produce the same amount of barium chloride? (2 marks)

If you tripled the amount of barium chlorate, what would be the effect on the total mass of products? (2 marks)

If the decomposition of 7.25g of barium chlorate produced only 3.72 g of barium chloride and 1.72 g of oxygen, how much barium chlorate did not decompose? (2 marks)