# Chemistry!

What is theoretical yield when 15.6g of bromobenzene & 8.3g of methyl benzoate is used in a Grignard reaction.

1. 👍 0
2. 👎 0
3. 👁 143
1. Start from an equation

2PhMgBr + PhCOOMe -> Ph3COH

so you need 2 moles of the Grignard reagent to each mole of the ester. As one mole of the PhBr formed from one mole of the Grignard reagent we need 2 moles of the PhBr.

So you need to
1. calculate the molar mass of each PhBr and PhCOOMe
2. calculate the number of moles of each
3. decide which is in excess.
4. calculate the theoretical yield (moles) of Ph3COH
5. calculate the molar mass of Ph3COH
6. calculate the theoretical yield (grams) of Ph3COH

1. 👍 0
2. 👎 0
posted by Dr Russ

## Similar Questions

1. ### chemistry(college)

A student reacts benzene,C6H6. with bromine. Br2. in an attempt to prepare bromobenzene. C6HSBr : C6H6 + Brl·---·-_·_-> C6HSBr + HBr (a) What is the theoretical yield of bromobenzene in this reaction when 60.0 g of benzene

asked by Lareese on April 30, 2012
2. ### Chemistry! Test tomorrow, pls help !

we're given the equation: C6H6(l)+Br2(l) --> C6H5Br(l)+HBr(g) you need to prepare 50.0g pf bromobenzene and you expect no more than a 75% yield. How much benzene should you begin with if the yield is 75%. i know that % yield =

asked by Alisha on October 4, 2012
3. ### Chem

I am having the following problem: I need to calculate 2 Keq values based on the experiment that I conducted. I reacted 0.082 moles of benzoic acid with 0.618 moles of methanol and obtained 0.055 moles of methyl benzoate. When I

asked by Sara on April 16, 2009
4. ### ochem

asked by ochem on February 27, 2012
5. ### Chemistry

What isthe theoretical yield of a microscale reaction of these materials in which 300 mg of bromobenzene, 50 mg of magnesium, and 350 mg of benzophenone were used?

asked by Fin on November 9, 2014
6. ### Chemistry

60.0 g of benzene is mixed with 135g of bromine to form bromobenzene according to the following reactionC6H6+Br2-C6H5Br+HBr which is the limiting reagent and what is the theoretical yield

asked by Stark State on October 25, 2010
7. ### math

how do you calculate theoretical yield of something? I don't know where to find the formula You go to the balanced chemical equation, and look at the mole ratio between the reactants and products. The theoretical yield is the

asked by james on January 31, 2007
8. ### Chemistry

The potassium salt of benzoic acid, potassium benzoate, KC7H5O2, can be made by the action of potassium permanganate on toluene, C7H8. C7H8 + 2 KMnO4 --> 2MnO2 + KOH + H2O If the yield of potassium benzoate cannot be realistically

asked by Veronica on June 3, 2014
9. ### Chemistry

student did the Synthesis of Salicylic Acid experiment using 3.93 g of methyl salicylate. This was the limiting reagent for his experiment. What is the theoretical yield of salicylic acid for his experiment? The theoretical yield

asked by Lena on November 16, 2010
10. ### Chemistry

I have this question and I am pretty sure on what to use to solve it but I am just stuck. The reaction of 8 g of hydrogen and 28 g of carbon monoxide gave 16 g of methanol. What was the theoretical yield if the percent yield was

asked by Justin on September 16, 2011

More Similar Questions