Sep 19, 2015
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Hi everyone,

As most of you here, I am studying for the DAT and I write on November 7. I just did the chemistry questions on the sample 2007 DAT from the ADA website.

I was hoping someone could help me out with the following question:

51. During a titration it was determined that 30.00 mL of a 0.100 M Ce4+ solution was required to react completely with 20.00 mL of a 0.150 M Fe2+ solution. Which reaction occurred?

A. Ce4+ + 3Fe2+ + H2O ---> 3Fe3+ + CeO- + 2H+
B. 2Ce4+ + Fe2+ ---> Fe4+ + 2Ce3+
C. Ce4+ + Fe2+ ---> Fe3+ + Ce3+
D. Ce4+ + 2Fe2+ ---> 2Fe3+ + Ce2+
E. Ce4+ + 2Fe2+ ---> 2Fe4+ + Cs2+ + 2e-

To be honest, I have no idea how to approach this question. I eliminated E because of the Cs presence. The answer is C but I don't know why and how to get to that answer.

Any help would be appreciated! Thank you loads,

spraypainter
 
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