Name______________________________
Unknown Number _______
Unknown Functional Group ______________________
Identity (name) ________________________________
Structure: (draw below)
Rubric
functional group
unknown identity
Tollens test
Schiff test
Iodoform test
Boiling point data
Refractive index data
Semicarbazone derivative
Conclusion
correctly identified (3pts)
/3 incorrectly identified (0 pts)
correctly identified (3pts)
/3 incorrectly identified (0 pts)
test carried out correctly, accurately observed, and correctly
/3 interpreted (1 pt each test)
test carried out correctly, accurately observed, and correctly
/3 interpreted (1 pt each test)
test carried out correctly, accurately observed, and correctly
/3 interpreted (1 pt each test)
measurement recorded as a range, within 3oC of literature value. (2
/2 pts)
measurement recorded accurately to the correct number of significant
/1 figures. Temperature of measurement recorded. (1 pt)
measurement recorded as a range, within 5oC of literature value. (2
/2 pts)
Each classification test result described as positive or negative and
/2 implication of test is stated (2 pts)
Clearly sums information that can be deduced from classification tests
including determination of functional group. Conflicting data, if any, is
/2 discussed.
Experimental and literature data for the boiling point, refractive index,
and semicarbazone derivative of the unknown and chosen compound
/3 are stated and compared. (3 pts)
Clearly states in detail how data was used to narrow choices and
/3 ultimately determine the identity of the compound. (3 pts)
Total
/30
Results
Unknown Physical properties
Boiling point range (raw data)
Boiling point range (calibrated data)
Refractive index
Results for the Tollens Silver Mirror Test
Chemical
Observations
@
o
C
positive or negative?
Interpretation
positive or negative?
Interpretation
positive or negative?
Interpretation
p-anisaldehyde
acetophenone
Your unknown
Results for the Schiff Test
Chemical
Observations
p-anisaldehyde
acetophenone
Your unknown
Results for the Iodoform Test
Chemical
Observations
p-anisaldehyde
acetophenone
Your unknown
Semicarbazone derivative
Melting point range (raw data)
Melting point range (calibrated data)
Conclusion


Classification tests (Tollens, Shiff, Iodoform). For each test…
o State if your unknown result was positive or negative. (You do not have to describe standards.)
o Explain what the result suggests about the structure of your unknown.
o Describe conflicting results, if any, and explain how you determined the functional group from the data.
Boiling point, derivative melting point, refractive index
o Compare your results to the literature value of your chosen compound. Cite both numbers for each
measurement in your conclusion.
o Explain how you ruled out other compounds with similar physical data.