Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 2

November 16, 2001
open notes, open book

1. Although I2 is an insulator under ambient conditions, with modest application of pressure it becomes a metal. Briefly explain why this happens in terms of an appropriate bonding theory.

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2. Diamond doped with nitrogen atoms is being considered for use in some semiconductor applications. Is this n-doped or p-doped? Explain your reasoning.

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3. PBr2Cl3 has three possible isomers. Give the point group of each isomer.

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4. Predict the products and estimate the enthalpy of reaction for:

F3B–S(CH3)2 + I2–P(CH3)3

Hint: use the data in Table 5.4, page 170 in your textbook to find the enthalpy for each complex and then find the reaction enthalpy.

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5. The following reaction can be balanced two ways. Balance the reaction both ways, give the standard potential for each balanced reaction, and estimate pKa1 and pKa2 for H2MoO4.

H2MoO4(s) + Mo(s) → Mo3+(aq) + MoO2(s)

Hint: use the data from Appendix 2, page 703.

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