Product: Dianisalacetone Molar Mass: 294.4 g/mol Calculate the theoretical yield

Question

Product: Dianisalacetone Molar Mass: 294.4 g/mol

Calculate the theoretical yield, determine the limiting reagent??

Product: Dianisalacetone Molar Mass: 294.4 g/mol Calculate the theoretical yield, determine the limiting reagent?? To a 50-mL Erlenmeyer flask, add a magnetic stir bar and 6.5 mL of 10% NaOH. To a second 50-mL Erlenmeyer flask, add 0.894 mL (1.000 g) of p-anisaldehyde and 0.278 mL (0.220 g) of acetone. Add 6.5 mL of ethanol to the acetone/aldehyde mixture. Mix these reagents and pour the solution into the flask containing the NaOH. Stir for a

Explanation / Answer

Mass of p-anisaldehyde = 1.000g

Moles of p-anisaldehyde = 1.000 g / 136.2 g/mol = 7.34 x 10^-3 mol

Mass of acetone = 0.220 g

Moles of acetone = 0.220 g / 58.1 g/mol = 3.78 x 10^-3 mol

As the moles of acetone are less than p-anisaldehyde, acetone is the limiting reagent.

p-anisaldehyde + acetone ----------------> Dianisalacetone

As the limiting reactant and product are in equimolar ratio,

the moles of product (Dianisalacetone) = 3.78 x 10^-3 mol

Mass of product = Moles x Molar mass = 3.78 x 10^-3 mol x 294.4 g/mol = 1.11 g

Thus, Theoretical yield = 1.11g

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