Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 2

October 31, 2008
open book, open notes

1. Estimate the lattice energy for KBr, which exists in the rock salt structure and has a Born exponent of 9.5.

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2. Despite having a filled electron configuration (s2d10), Zn is a metal. Explain.

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3. Write the reaction between iodine monochloride and methylamine, showing the Lewis structure for the product(s). Estimate the enthalpy of reaction.

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4. For each of the following pairs of aqueous solutions, indicate which will have the lower pH and explain your reasoning: a) 0.1 M Co(NO3)2 or 0.1 M Cu(NO3)2; b) 0.1 M Mn(NO3)2 or 0.1 M KMnO4; c) 0.1 M NaNO3 or 0.1 M AgNO3.

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5. Complete and balance the following reaction and estimate the standard potential:

MnO4(aq) + Mn(s) → Mn2+(aq) + Mn3+(aq)

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