I need help filling out the rest of the chart to find the percent recovery. Begi

Question

I need help filling out the rest of the chart to find the percent recovery.
Beginning weight of trans-stilbene: 0.419 g
My final weights after letting the products dry were:
Cis stilbene: 0.420 g Trans-stilbene: 0. 499 g Experiment 8-Bromination of Stilbene sical Molar D Mass Structure and Formula Density Melting Boiling (1) cis-stilbene (2) trans-stilbene (3) pyridinium tribromide 33 c oS (4) Glacial Acetic Acid (17.5M) Quantities of Reagents Used and Products Formed-cis-Stilbene Structural Formula Mass Moles Limiting Velume (mL.) 6.3 mL Pro Product Actual Theoretical />2 Percent Yield: Quantities of Reagents Used and Products Formed - trans-Stilbene Structural Formula Moles Limiting Reagent Check Mass Volume (mL) (2 0.86g 0.8664 2H 102 Netual Produ Percent Yield: 85

Explanation / Answer

Cis-stilbene

Limiting reagent = cis-stilbene

Theoretical yield of product = 0.00168 mol x 340.05308 g/mol = 0.5713 g

Actual yield = 0.4209 g

Percent yield = 0.4209 x 100/0.5713 = 73.67%

Trans-stilbene

(2) trans-stilbene = 0.419 g/180.2488 g/mol = 0.0023 mol

(3) pyridinium tribromide = 0.866 g/319.819 g/mol = 0.0027 mol

(4) glacial acetica acid = 8 ml x 1.05 g/mol/60.05 g/mol = 0.140 mol

Limiting reagent = trans-stilbene

Theoretical yield of product = 0.0023 mol x 340.05308 g/mol = 0.782 g

actual yield = 0.499 g

percent yield = 0.499 x 100/0.782 = 63.8%

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