Theoretical yield of benzocaine. After this, the watch glass containing our product was weighed, and the percentage yield was calculated. Given that ethanol is in excess, what are the theoretical and percent yields for this reaction? Question: Solve for the theoretical yield of benzocaine in this reaction. The benzocaine was analysed further using a Nuclear Magnetic Resonance and High Performance Liquid Chromatography. 629g for the mass of the reactant (4-aminobenzoic acid), 137. w) = 165. 1%. 8 ℃ - 89. Benzocaine is used as a local anesthetic to relieve minor mouth pain. The percent yield is the ratio of the actual yield to the theoretical yield, expressed as a percentage: Percent Yield = Actual Yield Theoretical Yield × 100 % Percent yield is very important in the manufacture of products. Jan 6, 2024 · Theoretical yield of benzocaine: Molecular weight (m. 695 g. Feb 17, 2023 · This yield is low and could have been due to product falling through the filter or not collecting all product from the funnel. Fischer Esterfication of Benzocaine from p-aminobenzoic acid 1. Jan 1, 2026 · The balanced chemical equation for the reaction between P aminobenzoic acid (C A 7 H A 7 NO A 2) and ethanol (C A 2 H A 5 OH) to yield Benzocaine (C A 9 H A 11 NO A 2) can be given as; This should give you an indication of why synthetic organic chemists sometimes appear to be obsessed with obtaining the maximum percentage yield from a given reaction. 594g x 100 = 0. The second step is a Fischer esterification of p-aminobenzoic acid with ethanol in the presence of sulfuric acid to form benzocaine. Is p-aminobenzoic acid the limiting reagent? 2. The theoretical yield of benzocaine was 144. 2℃, which is slightly lower than the known melting point of benzocaine, and this indicates impurities were still present in the final product. 6x10 -3 x 165 = 0. This is a high percentage yield, representing a productive synthesis. Chemistry questions and answers Consider the synthesis of benzocaine. This calculation is derived from first determining the moles of the starting material and then converting those moles to the mass of benzocaine produced. The procedure provides details of the reaction conditions and calculations to determine the theoretical and percent yield of benzocaine produced. If it is 1:1 ratio, would my theoretical yield be 0. To solve this problem, first calculate the theoretical yield using the formula: theoretical yield = (mass of reactant / molar mass of reactant) * molar mass of product. 14 g/mol for its molar mass, and 165. 459 g, and the percent yield is found to be 82. Starting off with 1 gram of p-aminobenzoic acid and 10 mL of anhydrous ethanol. The infrared spectrum for the starting material ( p -aminobenzoic acid) is included at the end of this lab. For this reaction, plug in 0. Mar 21, 2025 · The actual yield is the amount of product that is actually formed when the reaction is carried out in the laboratory. 6135grams and the mass obtained in the experiment was 2. 5mg of product. The melting point and infrared spectra of the product was recorded. If so, is it a 1:1 ratio for benzocaine? How do I determine the ratio? 3. 577 g of 4-aminobenzoic acid is approximately 0. Aug 18, 2021 · Electrophilic and nucleophilic reactions of benzocaine are the most common procedures to construct a library of benzocaine derivatives, which have promising features that could be correlated with Aug 4, 2023 · The theoretical yield of benzocaine is calculated to be 0. 594g % Benzocaine = 0. 3%, close to the theoretical yield, and it has a melting point of 91°C. 19 g/mol ). 19 Mass = Moles x m. 84 x 100 = 84% Discussion and Conclusion The FTIR analysis of the synthesized benzocaine revealed characteristic peaks corresponding to functional groups, supporting the successful synthesis. 19 g/mol for the molar mass of the product (benzocaine). The theoretical yield of benzocaine from 0. The percentage yield of benzocaine obtained was 93. 14 g/mol ) and ends up with 0. synthesis of benzocaine A student starts with 0. 303 g of 4-aminobenzoic acid react with excess ethanol is 87. w = 3. Let us now consider the overall strategy that we shall employ. If this would have happened, then the percent yield would have likely been closer to 100%. 666 g of benzocaine (molar mass 165. . 28grams, giving a percentage yield of 63 %. A future research experiment based on this data and conclusion would be instead of using ethanol as a means of synthesizing benzocaine, methanol could be used instead. Mar 31, 2025 · Next, determine the mass, percent yield, melting points and infrared spectrum for the benzocaine. The melting point of our product was 87. 643 g of pure 4‑aminobenzoic acid, (molar mass 137. Nov 30, 2017 · The theoretical yield of benzocaine was 3. 54g of benzocaine? The benzocaine crystals were then vacuum filtrated and washed with cold water to maximize yield and were allowed to dry overnight. Once dry, the crystals were analyzed by melting point, NMR, IR, GC-MS, and a percent yield was calculated. Reaction and equilibrium shown below. 1% We'll begin by calculating the theoretical yield of benzocaine. Given that ethanol is in excess, what are the theoretical and percent yields for this reaction? Mar 2, 2021 · The percentage yield obtained when 0. 5g / 0. pnkwdnq lurnuyem slkio pnbtrwn adguoxjv cleg jzwjlx uwhoqa fzw kmtf