What’s on the Solutions poster
A 5-row table: Unit · Is · Used for.
Concentration units.
- Molarity (M) — mol per dm³ of solution — Most lab work
- Molality (m) — mol per kg of solvent — Colligative properties
- Mass % — g solute per 100 g solution — Industry
- ppm — mg per kg, or mg per dm³ — Trace analysis
- Mole fraction — mol of one ÷ total mol — Gas mixtures, Raoult's law
Molarity changes with temperature because volume does. Molality does not, which is why it is used for freezing point depression.
Questions about the Solutions poster
- What’s on the Solutions poster?
- A 5-row table: Unit · Is · Used for. Concentration units. Molarity (M) — mol per dm³ of solution — Most lab work; Molality (m) — mol per kg of solvent — Colligative properties; Mass % — g solute per 100 g solution — Industry; ppm — mg per kg, or mg per dm³ — Trace analysis; Mole fraction — mol of one ÷ total mol — Gas mixtures, Raoult's law. Molarity changes with temperature because volume does. Molality does not, which is why it is used for freezing point depression.
- Who is the Solutions poster for?
- Solutions belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning general chemistry can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Solutions poster?
- Molarity is standard in the lab. Molality is used where temperature varies. A wall chart earns its place by being glanceable from where the work is happening, so Solutions belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Solutions?
- Acids & Bases, Atomic Structure and Balancing Equations sit alongside Solutions in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Acids & BasesAtomic StructureBalancing Equations
- Is the Solutions poster free to download and print?
- Yes. Solutions 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 Solutions poster print at?
- Solutions 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 Solutions loses nothing.Printing guide
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