Here is a link showing cinnamic acid. Br2 adds across the double bond.
This is a limiting reagent problem; I now because values are given for BOTH reactants.
1. Convert 128 mg cinnamic acid to mols. mols = grams/molar mass
2. Convert the bromine to mols.
3a. Using the coefficients in the balanced equation, convert mols cinnamic acid to mols of the poduct.
3b. Do the same for mols Br2.
3c.It is likely that the mols for 3a and 3b will be different which means one of them is wrong.
3d. The correct value in limiting regent problems is ALWAYS the smaller value and the reagent providing that value is the limiting reagent.
4. g product = mols x molar mass. This is the theoretical yield (TY)
5. %yield = (actual yield/TY)*100 = ?
how do i find the limiting reagent without a reaction? is everything 1 mol to 1 mol?
i found 0.0008693 mols for the cinnamic acid
and 0.0023 mols for Br
that means the cinnamic is the limiting reagent
so i converted and got 0.069 g Br as the theoretical but that doesnt make any sense because shouldnt the theoretical be higher than the actual? (the actual is 0.184 g Br)
i dono why im having so much trouble, thanks for the help
The product isn't bromine, it's 2 3-dibromo-3-phenylpropanoic acid. The MM for the product should be 307.97g.
Answer this Question
Chemistry - Suppose a student started with 133 mg of trans-cinnamic acid and 0....
chemistry - Suppose a student started with 135 mg of trans-cinnamic acid and 0....
Organic Chemistry - Suppose a student started with 129 mg of trans-cinnamic acid...
Chemistry - Suppose a student started with 129mg transcinnamic acid and 0.50ml ...
chemistry - Why must bromine be added slowly to trans-cinnamic acid?
Chemistry - Why is it when you add bromine to trans-cinnamic acid, it is more ...
organic chem - An unknown compound melted at 131-133°C. It is thought to be one ...
Organic Chemistry - Explain why the addition of bromine to trans-cinnamic acid ...
chemistry - hi this is a question for my lab. explain why the addition of ...
organic chemistry - Write a mechanism to illustrate what will happen if the ...