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Partition coefficient of iodine template
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Separating funnel of iodine in cyclohexane over water, layers run off separately, each titrated with sodium thiosulfate using starch. IB / A-level extension and university physical.
What the template shows
- Iodine shared between two solvents: K = [I₂]org ÷ [I₂]aq
- Cyclohexane layer (top)
- Violet I₂. Older manuals use CCl₄, which is denser, so the layers swap
- Water layer (bottom)
- Pale yellow-brown
- Shake well, venting often; settle at constant temperature, then run off each layer separately
- Portion of a layer
- Pipette a measured volume of each layer (pipette filler)
- e.g. 0.1 M for the organic layer, 0.01 M for the water layer
- Starch near the end
- Blue-black to colourless. Add KI(aq) and shake hard with the organic portion so all I₂ is titrated
- Reaction setup
Drawn with 17 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.
- Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need.
- Add your own structures, arrows and text next to it, or combine several templates on one page.
- Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers.
Frequently asked questions
Is the Partition coefficient of iodine template free?
You can preview the Partition coefficient of iodine template here and open and edit it in MolDraw for free. Downloading or exporting it is part of MolDraw Pro, together with the other premium templates.
Can I edit the Partition coefficient of iodine 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.
Can I edit the glassware?
Yes. Every piece of glassware is a MolDraw apparatus object: move, resize, recolour the liquid or swap a piece and the joints stay connected.