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hw-1[1].-fall-10

hw-1[1].-fall-10 - 1a The element hydrogen has been placed...

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1a. The element hydrogen has been placed in the following groups in the periodic table: (IUPAC #s), 1, 17, 14 and floating above the main table, often coupled with He. Explain briefly the justification for each placement. Group 1………………………………………………………………………………………………………(1) Group 17……………………………………………………………………………………………………..(1) Group 14……………………………………………………………………………………………………..(1) Floating..……………………………………………………………………………………………………..(1) 1b. Cryolite, Na 3 AlF 6 , is produced in the following reaction. 6 NaOH + Al 2 O 3 + 12 HF 2 Na 3 AlF 6 + 9 H 2 O Calculate the yield assuming that the complete reaction of 287g of Al 2 O 3 produced 945g of cyolite.
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(7 points) 2a.
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