Theoretical Yield in Multi-Step Synthesis

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To find the theoretical yield of methyl m-nitrobenzoate from 10.0 g of benzoic acid, the first step involves converting benzoic acid to methyl benzoate, yielding 11.15 g. The second step calculates the yield of methyl m-nitrobenzoate from methyl benzoate, resulting in 14.83 g as the theoretical yield. The calculations rely on stoichiometric conversions using molar masses of the compounds involved. An alternative method suggested is to multiply the moles of benzoic acid directly by the molar mass of m-nitrobenzoate for a simplified approach. Accurate formula weights are essential for ensuring the validity of the theoretical yield.
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Homework Statement



Exactly how do you find the theoretical yield of methyl m-nitrobenzoate from 10.0 g of benzoic acid?


Homework Equations



1) Ph-COOH + CH3OH + H2SO4 --> Ph-COOCH3
2) Ph-COOCH3 + HNO3 + H2SO4 --> methyl m-nitrobenzoate



The Attempt at a Solution



10.0 g benzoic acid*(1 mol benzoic acid/122.122 g benzoic acid)*(1 mol methyl benzoate/1 mol benzoic acid)*(136.149 g methyl benzoate/1 mol methyl benzoate) = 11.15 g methyl benzoate from FIRST STEP as theoretical yield

11.15 g methyl benzoate*(1 mol methyl benzoate/136.149 g methyl benzoate)*(1 mol methyl m-nitrobenzoate/1 mol methyl benzoate)*(181.147 g methyl m-nitrobenzoate/1 mol methyl m nitrobenzoate) = 14.83 g methyl m-nitrobenzoate from 10.0 g benzoic acid as theoretical yield?

Thanks.
 
Last edited:
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That looks good if the formula wts. you give are accurate. I didn't check.
Also, you could have just multiplied the number of moles of benzoic acid by the formula wt. of m-nitromethylbenzoate.
 

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