Question

Type out your calculation and result for the theoretical yield of the cis-dibenzoylethylene synthesis in units of grams. Use the asterisk (*) for the multiplication sign and a forward slash (/) for the division. Additionally, examine the three HPLC traces from this experiment. The first two depict the pure samples of trans- and cis-1,2-dibenzoylethylene (DBE), respectively. The third one represents the cis isomer heated with acid.

Answer 1

To calculate the theoretical yield of the cis-dibenzoylethylene synthesis, convert the mass of the starting material to moles, use stoichiometry to determine the moles of the product, and convert the moles of the product to grams using its molar mass.

Step-by-step explanation:

Theoretical yield of the cis-dibenzoylethylene synthesis can be calculated using the equations:

1. Convert the given mass of starting material to moles using its molar mass
2. Use stoichiometry to determine the moles of the product
3. Convert the moles of the product to grams using its molar mass

For example, if the starting material has a mass of 10 grams and the molar mass of the product is 100 g/mol, the calculation would be:

Moles of starting material = mass / molar mass = 10 g / 50 g/mol = 0.2 mol

Moles of product = moles of starting material * stoichiometry ratio = 0.2 mol * 1 = 0.2 mol

Theoretical yield in grams = moles of product * molar mass = 0.2 mol * 100 g/mol = 20 grams