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Assume that the mass of impure acetanilide is 1.732 g. and the mass of recrystallized acetanilide is 1.271 g. Calculate the percent recovery.
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- 1.In the preparation of aspirin, 6.0 grams of salicylic acid was made to react with acetic anhydride gnbydride forming 4 grams of aspirin. Calculate the % yield of aspirin. 2. calculate the amount of sodium salt of aspirin obtained from the preparation.Fehling reagent I is prepared by dissolving 138.6 g of CuSO4·5H2O in 2 L H2O. The molecular weight of CuSO4·5H2O is 249.685 g/mole. Calculate the molarity of Fehling reagent I.The number of moles of H2O produced in reaction of 50 mL 1.0 M CH3COOH and 50 mL 1.0 M NaOH.
- 1.ln the preparation of aspirin, 6.0 grams of salicylic acid was made to react with acetic anhydride anbydride forming 4 grams of aspirin. Calculate the % yield of aspirin. 2. calculate the amount of sodium salt of aspirin obtained from the preparation.4. Calculate the theoretical mass of acetanilide produced when the mass of aniline used in the reaction equates to 4.000g. The reaction goes 100% to completion and aniline is the limiting reagentThe molecular weight of acetanilide is 135.17 grams/mole. The solubility of acetanilide in water is 5.5 grams/100 mL at 100°C and 0.53 grams/100 mL at 0°C. You are given a 30.0 gram sample of acetanilide that has been contaminated with insoluble sawdust. For every 10.0 grams of sample, 1.5 grams of that sample is sawdust. Theoretically, if you use just enough water to dissolve the entire sample of acetanilide, how much acetanilide will crystallize upon cooling to 0°C? 25.5 grams 23.0 grams 105.2 grams 109.7 grams 2.5 grams
- how many moles of H2 and N2 can be formed by the decomposition of 0.145 moles of amonia (NH3)?The molecular weight of acetanilide is 135.17 grams/mole. The solubility of acetanilide in water is 5.5 grams/100 mL at 100°C and 0.53 grams/100 mL at 0°C. You are given a 30.0 gram sample of acetanilide that has been contaminated with insoluble sawdust. For every 10.0 grams of sample, 1.5 grams of that sample is sawdust. Theoretically, if you use just enough water to dissolve the entire sample of acetanilide, how much acetanilide will crystallize upon cooling to 0°C?The number of moles of NaOH used is 0.5 and number of moles of methyl salicylate is 0.023 . What is the limiting reagent and please calculate the theoretical yield of the salicylic acid product in grams
- If MgCl2·H2O is the limiting reagent with a mole amount of 0.00189 mole. What is the theoretical yield of Mg(OH)2 (58.319 g mol-1) precipitate which will be formed?A popular brand of tea powder contains 3.5% caffeine as indicated by the label on it. 1.80 g of the tea powder was used to extract caffeine from it and obtained 0.031 g of pure caffeine. What is the percentage recovery of caffeine based on the caffeine content (as labeled) in the tea powder? O 49.21% O 1.72% O 62.50% O 42.25%An impure sample of table salt that weighed 0.8631 gg when dissolved in water and treated with excess AgNO3AgNO3 formed 2.040 gg of AgClAgCl . What percentage of NaClNaCl is in the impure sample?