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Unformatted text preview: imately 2.4 grams of cobalt(II) chloride hexahydrate to
begin the synthesis. What is the precise mass in grams of starting material, cobalt(II)
chloride hexahydrate, that you used? Your mass precision should be reported to a
thousandth of a gram.
What is the molar mass of Co[H2O]6Cl2 Five choices will be given.
How many moles of Co[H2O]6Cl2 were available of the starting material?
The theoretical yield (in grams) of product is obtained by assuming that every mole of
Co[H2O]6Cl2 available as the starting material is converted to product trans[Co(en)2Cl2]Cl2. What value in grams is your theoretical yield of product?
What is the mass in grams of product, trans-[Co(en)2Cl2]Cl, that you collected? Your
mass precision should be to a thousandth of a gram.
44 Based on your calculated theoretical yield and your reported mass of product, calculate
the percent yield of product, trans-[Co(en)2Cl2]Cl? Report your percent yield to a tenth of
a percent, i.e. 45.3%.
Concluding Remarks: Briefly discuss interpretations of your observations and results.
Include in your discussion, any conclusions drawn from the results and any sources of
error in the experiment. 45 46 A Spectroscopy Study
Spectrophotometric Analysis of trans-Co[(en)2Cl2]Cl
and the Aquation Product, [Co(en)2(H2O)Cl]Cl2
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07