Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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A student carries out the following experiments and records the following observations.
1. A few drops of a solution of KOH (aq) is added to a solution of Fe(NO3)3 (aq). A red gelatinous solid forms immediately upon addition.
2. A few drops of a solution of KOH (aq) is added to a solution of NaNO3 (aq). No changes are observed.
3. A few drops of a solution of KOH (aq) is added to a solution that could contain Fe3+(aq) and/or Na+(aq) ions (the solution could contain both ions, just one ion, or neither ions). A red gelatinous solid forms immediately upon addition.
Select all of the answers that are consistent with the data from those 3 experiments.
Group of answer choices
The unknown contains Fe3+(aq) and Na+(aq)
The unknown contains Fe3+(aq)
It is not possible to determine the presence of Na+(aq) from this experiment
The unknown contains neither Fe3+(aq) or Na+(aq)
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