Acetylsalicylic acid (C9H8O4), commonly called aspirin, is produced when salicylic acid (C7H6O3) reacts with acetic anhydride (C4H6O3). The balanced equation is written below. Determine the mass of aspirin produced when 150.0 grams of salicylic acid reacts with an excess of acetic anhydride.
C7H6O3 + C4H6O3 → C9H8O4 + HC2H3O2
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2016-05-09 9:30 pm
回答 (3)
2016-05-09 9:48 pm
✔ 最佳答案
C₇H₆O₃ + C₄H₆O₃ → C₉H₈O₄ + HC₂H₃O₂Mass of C₇H₆O₃ = 150.0 g
Molar mass of C₇H₆O₃ = 12.01×7 + 1.01×6 + 16.00×3 = 138.13 g/mol
No. of moles of C₇H₆O₃ = (150.0 g) / (138.13 g/mol) = 1.086 mol
According to the equation, mole ratio C₇H₆O₃ : C₉H₈O₄ = 1 : 1
No. of moles of C₉H₈O₄ produced = 1.086 mol
Molar mass of C₉H₈O₄ = 12.01×9 + 1.01×8 + 16.00×4 = 180.17 g/mol
Mass of C₉H₈O₄ produced = (180.17 g/mol) × (1.086 mol) = 195.7 g
2016-05-09 10:01 pm
150.0 g / 138.121 g/mole = 1.086 mole of C7H6O3
1.086 mole of C9H8O4 x 180.157 g/mole = 195.65 g
Theoretical yield = 195.65 g
1.086 mole of C9H8O4 x 180.157 g/mole = 195.65 g
Theoretical yield = 195.65 g
2016-05-09 9:39 pm
Steps for solving this problem:
1. Balance the equation
2. Find the moles of salicylic acid
3. Use mole ratios to get the moles of the aspirin
4. Multiply by the molar mass of the aspirin to get the final answer
1. Balance the equation
2. Find the moles of salicylic acid
3. Use mole ratios to get the moles of the aspirin
4. Multiply by the molar mass of the aspirin to get the final answer
收錄日期: 2021-04-18 14:50:37
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https://hk.answers.yahoo.com/question/index?qid=20160509133048AAFRJct