How do you calculate percent yield of cyclohexene?
made: that the gc detector response is the same for cyclohexene and toluene. We will accept this assumption for our purposes. In fact it is a good assumption in this case). The percent yield then would be (1.09 g actual / 1.68 g theoretical) x 100 = 65%.
How do you calculate the cyclohexanol theoretical yield of cyclohexanone?
As 0.15 mol of cyclohexanol is going to undergo reaction, 0.15 mol of cyclohexanone (Mw 98 g/mol) should be produced. Therefore, the theoretical yield is: 0.15 mol x 98 g/mol = 14.7 g.
What is the product of dehydration of cyclohexanol?
In this experiment, cyclohexanol is dehydrated by aqueous sulfuric acid to produce cyclohexene as the sole product [equation (1)], and no rearrangement is possible in this reaction.
What is the theoretical yield of cyclohexanol to cyclohexene?
In other words, 2.05 g of cyclohexanol should produce 1.68 g of cyclohexene. This is the best-case yield also known as the theoretical yield.
Why is phosphoric acid used in the dehydration of cyclohexanol?
If cyclohexanol is heated with a catalytic amount of phosphoric acid, elimination of water (dehydration) results in cyclohexene as the product. The role of the phosphoric acid is to protonate the alcohol (‘step a’ below), making it a viable leaving group.
Is dehydration of cyclohexanol E1 or E2?
The dehydration of cyclohexanol follows the E1 mechanistic pathway.
How do you dehydrate cyclohexanol?
The dehydration of cyclohexanol to give cyclohexene Cyclohexanol is heated with concentrated phosphoric(V) acid and the liquid cyclohexene distils off and can be collected and purified. Phosphoric(V) acid tends to be used in place of sulphuric acid because it is safer and produces a less messy reaction.
How do you calculate the yield of cyclohexanol to cyclohexene?
0.0205 mol x 82.1 g/mol = 1.68 g cyclohexene In other words, 2.05 g of cyclohexanol should produce 1.68 g of cyclohexene. This is the best-case yield also known as the theoretical yield. Percent Yield.
How do you convert moles of cyclohexanol to moles?
One mole (mol) of cyclohexanol should produce one mole of cyclohexene. If 2.05 g of cyclohexanol is used (use the actual amount used in your experiment) convert this to moles by dividing by the molecular weight of cyclohexanol (MW = 100.2 g/mol).
How do you make cyclohexanol solution with sulfuric acid?
Into a clean 100-mL round-bottom flask (it does not have to be dry – why?) place 10 mL of cyclohexanol (density = 0.963 g/mL) and then add 5 mL of 9 M sulfuric acid (wear gloves when handling the acid). Mix the contents of the flask by swirling it carefully. Clamp the flask and place a heating mantle under it.