Posted: December 8th, 2015

synthesis of metal complexes

Procedure
Describe the procedure that you used to prepare the metal complex. Include the mass amounts of all reagents, the volumes of liquids, and the mass amount of the final product. Note the colors observed as well.

This should NOT be a complete reiteration of everything written in this section of the laboratory book. This section is also written in paragraph form and in full sentences. Formal lab reports are written in the third person passive voice, past tense. Never use the words “I” or “we” in a formal lab report. For instance, do not write “We determined the volume of a glass bead using the displacement method.” Instead, state “The volume of a glass bead was determined through the displacement method.”

Data
Create and fill out the data table for Parts II, III, and IV of the lab in the data tab of the excel file Chem L111_Synthesis of Metal Complexes_YOUR NAME, and then copy and paste it here.

Discussion (Report Section in the Lab Book)
Fill out Table 1: Separation of Salicylic Acid From Sodium Chloride in the discussion tab of the excel file Chem L111_Synthesis of Metal Complexes_YOUR NAME, and then copy and paste it here.
• Discuss possible sources of error if your percent recovered is not between 95 and 105%.
• Explain how it is possible to recover more than 100% of the salicylic acid from the mixture of salicylic acid and sodium chloride.

You used vacuum filtration to isolate two different substances in this experiment. In which case was a physical change involved prior to filtration and in which case was a chemical change involved prior to filtration? Explain.

Hint: There are a lot of repetitive calculations involved in filling out Tables 2 and 3. Using Excel to perform these calculations can save you some time.

Fill out Table 2: Group Data From Metal Complex Synthesis in the discussion tab of the excel file Chem L111_Synthesis of Metal Complexes_YOUR NAME, and then copy and paste it here.
• State the trend between the mass of product formed and the mass of the metal salt used.
• For each trial, determine which reactant is the limiting reagent and which reactant is in excess.
• Explain how the trend observed between mass of product formed and the mass of the metal salt used helps you to identify the limiting reagent.
• Explain which theoretical mass of product should be used in a calculation of the percentage yield for your trial.

Fill out Table 3: Group Results From Metal Complex Synthesis in the discussion tab of the excel file Chem L111_Synthesis of Metal Complexes_YOUR NAME, and then copy and paste it here.
• Summarize what you learned from this experiment regarding reaction stoichiometry and the limiting reactant concept.

References
Be sure to reference any/all outside resources that are used to write your formal lab report. This includes your textbook.