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Pre-lab worksheet: aspirin template
Free template. Download it, or open it in MolDraw to change it first.
Preparation of aspirin from salicylic acid and acetic anhydride (H₃PO₄ catalyst): reaction scheme, a reagent table to fill in (M, mass, mmol, equiv), limiting reagent and theoretical yield, hazards, four short questions and a separate answer key.
What the template shows
- Pre-lab worksheet: preparation of aspirin
- Complete before the practical: the reagent table, the yield questions and the safety notes
- Reaction scheme
- salicylic acid
- acetic anhydride
- acetic acid
- Reagent table (fill in)
- Amount used
- phosphoric acid (85 %)
- aspirin (product)
- Yield questions
- 1. Which reagent is limiting? Show the mole comparison.
- 2. Calculate the theoretical yield of aspirin in grams.
- 3. A student isolates 2.05 g of dry aspirin (example value). Calculate the percentage yield.
- corrosive (burns skin, eyes), lachrymator, flammable liquid
- fume hood, gloves and goggles; dispense from the bottle in the hood
- phosphoric acid, 85 %
- goggles and gloves; dilute spills with water
- harmful if swallowed; serious eye damage
- goggles; avoid dust
- harmful if swallowed
- do not taste the product
- Short questions
- 1. What is the role of the phosphoric acid?
Drawn with 34 atoms, 1 arrow, 38 shapes – every one editable in MolDraw.
Sources
How to use this template
- Press Edit in MolDraw. The template opens on the canvas of the free MolDraw editor.
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Frequently asked questions
Is the Pre-lab worksheet: aspirin template free?
Yes. The Pre-lab worksheet: aspirin template is one of the free MolDraw templates: open it in the editor or download it from this page as SVG or PNG and use it in your slides, worksheets and notes.
Can I edit the Pre-lab worksheet: aspirin template?
Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it.
Is the chemistry checked?
Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page.
Are the teaching lab sheets printable?
Yes. Open one in MolDraw, add your school or course name and export it as PDF to print.