What’s on the Indicators poster
A 4-row table: Titration · pH at equivalence · Indicator.
Indicator range against titration type.
- Strong acid–strong base — 7 — Either
- Strong acid–weak base — <7 — Methyl orange
- Weak acid–strong base — >7 — Phenolphthalein
- Weak acid–weak base — ~7 — None suitable
Methyl orange: red to yellow, pH 3.1–4.4. Phenolphthalein: colourless to pink, pH 8.3–10.0.
Questions about the Indicators poster
- What’s on the Indicators poster?
- A 4-row table: Titration · pH at equivalence · Indicator. Indicator range against titration type. Strong acid–strong base — 7 — Either; Strong acid–weak base — <7 — Methyl orange; Weak acid–strong base — >7 — Phenolphthalein; Weak acid–weak base — ~7 — None suitable. Methyl orange: red to yellow, pH 3.1–4.4. Phenolphthalein: colourless to pink, pH 8.3–10.0.
- Who is the Indicators poster for?
- Indicators belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning analytical can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Indicators poster?
- The indicator's range must fall within the vertical section of the pH curve. A wall chart earns its place by being glanceable from where the work is happening, so Indicators belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Indicators?
- Calibration, Chromatography Methods and Errors & Uncertainty sit alongside Indicators in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.CalibrationChromatography MethodsErrors & Uncertainty
- Is the Indicators poster free to download and print?
- Yes. Indicators 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 Indicators poster print at?
- Indicators 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 Indicators loses nothing.Printing guide
Related posters
Charts that sit alongside Indicators on the same wall.
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