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- 1. Write out the balanced equation for the reaction between salicylic acid and aceticanhydride .2. Calculate the percent yield for the above reaction if the amount of aspirinobtained was 2.301 g. 3. Calculate the theoretical yield of aspirin if you start with 2.687 g of salicylic acidand an excess of acetic anhydride. 4. If you were to start with 1.00 g of salicylic acid, what volume of acetic anhydridewould be needed to completely react with it? The density of acetic anhydride is1.082 g/mL.5. According to your results from part 3 of this experiment, what can you say aboutthe purity of your aspirin? Be as specific as possible.6. Explain why acetic acid is unlikely to be a contaminant in your solid aspirin.7. Look up and record the boiling point of acetic acid, and explain why only some ofit evaporates from the reaction mixture.8. If you measured the melting point of the solid product from this experiment andobtained a melting range of 122-128 ℃, what does this tell you?9. Aspirin that…How many grams of NaBH4 are needed to reduce 13.75 g of a ketone with molar mass 152.24 g/mol such that there are 1.53 equivalents of hydride?31. A sample of meat scrap weighing 2.000 g is digested with concentrated H2SO4 and a catalyat. The resulting solution is made alkaline with NaOH and the liberated ammonia distilled into a 50.0 mL of 0.6700 N H2SO4. The excess then requires 30.10 mL of 0.06520 N NaOH for neutralization. What is the percentage of nitrogen in the meat?
- In the preparation of p-Iodonitrobenzene, Calculate the percent yield.Assume that 3.0 g of aniline and 4.5 ml of acetic anhydride are used in the preparation of acetanilide. What is the limiting reagent? What is the theoretical yield of acetanilide? What is? the percentage yields if 3.3 g of acetanilide is obtainedC7H6O3 + C4H6O3 <-> C9H8O4 + C2H4O2 1.0g of salicylic acid reacts completely with an recess if acetic anhydride. Whats the theoretical yield of aspirin in G?
- What is the % by weight of Cl in C2H4Cl2?a) Compare between equivalence point and endpoint. Distinguish which point comes first. b) Sulfanilamide, C6H4N2O2S is a sulfonamide antibacterial drug. The purity of sulfanilamide (168.18 g/mol) can be determined by the following steps. First, oxidize sulfur to SO₂ gas. Next, allow SO₂ gas generated to pass through H₂O₂ to produce H₂SO4. The acid is then titrated with NaOH standard solution. Given a 0.5136 g of sulfanilamide sample required an average titre volume of 48.13 mL 0.1251 M NaOH. Suggest a suitable indicator to be used in this titration and predict the purity of sulfanilamide being analysed. (Note: 1 mol sulfanilamide = 1 mol H₂SO4)Write the balanced chemical equation for the reaction of oxalic acid dihydrate with sodium hydroxide.