What’s on the Purification poster?

5 numbered steps, with a full worked run-through. Recrystallising a crude solid. Dissolve in minimum hot solvent — Minimum, or the yield falls.; Hot filter if needed — Removes insoluble impurities while everything else stays disso…; Cool slowly — Slow cooling gives larger, purer crystals.; Filter under reduced pressure — Büchner funnel; soluble impurities stay in the filtrate.; Wash with cold solvent, then dry — Cold, or you redissolve the product.. A depressed and broadened melting range is the classic sign of impurity, and is why melting point is the standard purity check.

Who is the Purification poster for?

Purification belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning lab practice can pin it up — a beginner, a student mid-course, or someone revising years later.

When should you use the Purification poster?

Recrystallisation exploits the difference in solubility between hot and cold solvent. A wall chart earns its place by being glanceable from where the work is happening, so Purification belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.

What other posters go with Purification?

Apparatus, Calorimetry and Graphs in Chemistry sit alongside Purification in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.

Is the Purification poster free to download and print?

Yes. Purification downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.

What size does the Purification poster print at?

Purification is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Purification loses nothing.

Purification — free printable poster

Purification — printable physical science wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Purification, step by step

Recrystallising a crude solid.

Dissolve in minimum hot solventMinimum, or the yield falls.
Hot filter if neededRemoves insoluble impurities while everything else stays dissolved.
Cool slowlySlow cooling gives larger, purer crystals.
Filter under reduced pressureBüchner funnel; soluble impurities stay in the filtrate.
Wash with cold solvent, then dryCold, or you redissolve the product.

Purity check

Melting point: sharp and matching the literature
Impure solids melt lower and over a range

A depressed and broadened melting range is the classic sign of impurity, and is why melting point is the standard purity check.

Questions about the Purification poster

What’s on the Purification poster?: 5 numbered steps, with a full worked run-through. Recrystallising a crude solid. Dissolve in minimum hot solvent — Minimum, or the yield falls.; Hot filter if needed — Removes insoluble impurities while everything else stays disso…; Cool slowly — Slow cooling gives larger, purer crystals.; Filter under reduced pressure — Büchner funnel; soluble impurities stay in the filtrate.; Wash with cold solvent, then dry — Cold, or you redissolve the product.. A depressed and broadened melting range is the classic sign of impurity, and is why melting point is the standard purity check.
Who is the Purification poster for?: Purification belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning lab practice can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Purification poster?: Recrystallisation exploits the difference in solubility between hot and cold solvent. A wall chart earns its place by being glanceable from where the work is happening, so Purification belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
What other posters go with Purification?: Apparatus, Calorimetry and Graphs in Chemistry sit alongside Purification in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Apparatus Calorimetry Graphs in Chemistry
Is the Purification poster free to download and print?: Yes. Purification downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Purification poster print at?: Purification is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Purification loses nothing.Printing guide

Purification, step by step

Questions about the Purification poster

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