Which to use
“pH” and “PQ” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,377
- “pH” frequency rank
- #2,142
- “PQ” frequency rank
- 12519
- confusion score
Side-by-Side Comparison
| Feature | pH | PQ |
|---|---|---|
| Definition | Opposé du logarithme décimal de la concentration en ions hydroniums d’une solution aqueuse. Échelle de mesure de l’acidité d’une solution. ( pH = -log₁₀ [H⁺]) | Papier toilette. |
Where the eye mixes pH and PQ
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses pH with PQ
A purely visual mix-up. pH (\pe.aʃ\) and PQ (\pe.ky\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - h in “pH” becomes q in “PQ”. Our composite confusion score for this pair is 12519, derived from the frequency rank of both members and their visual similarity.
pH is recorded at frequency rank #10,377, classified as anoun, pronounced \pe.aʃ\. PQ is at rank #2,142, tagged as anoun, pronounced \pe.ky\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 12519, this pair ranks #404,931 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of pH vs PQ
Shared letters: p. Private to "pH": h. Private to "PQ": q.
"pH" · 2 letters · shape CC · "PQ" · 2 letters · shape CC
Frequently Asked Questions
Do "pH" and "PQ" mean the same thing in a sentence?
Frequency check: "pH" vs "PQ" - which ranks higher?
After this comparison
Eye-level mix-up between "pH" and "PQ" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "pH" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "PQ" - compare definitions side by side with the headword page. Word entry
- This pair ranks #404,931 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "pH" and "PQ" also get mixed up with nearby pairs, the highest-scored neighbour is "pH vs pio". Nearby pair
Confusion rank #404,931 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.