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CHEM 195, Spring 2016

(due March 30th at 9:00 am)
1. (15 pts) Suggest a method for separating individual compounds from the four-component
solid mixture containing I2, SrSO4, Fe2O3, and K2SO4. Briefly describe the sequence of
operations to be performed.

2. (15 pts) Suggest a series of five balanced chemical equations that could describe the
following transformations. Please do not use more than one additional reactant in each step.
Each arrow corresponds to one reaction.
Ca  Ca(OH)2  CaCO3  CaO  CaCl2  Ca(NO3)2

CHEM 195, Spring 2016

3. (5 pts) How many electrons are needed in the balanced half-reaction for the oxidation of
ethanol to acetic acid?

4. (5 pts) Balance the following redox reaction that occurs in an aqueous solution:
Fe2+ + H2O2  Fe3+ + H2O

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