Olimpiadas Chilenas de Química (OChQ)¶
Overview¶
The Olimpiadas Chilenas de Química (OChQ) is Chile's national chemistry competition for secondary school students, organized by the Sociedad Chilena de Química (SChQ). The SChQ is a nationally recognized professional society with delegates in every region of Chile, maintaining affiliations with IUPAC, the Royal Society of Chemistry, the American Chemical Society, and the Academia Chilena de Ciencias.
The competition uses a three-stage elimination format, progressing from an online preliminary through regional in-person exams to a national final. Approximately 68–70 national finalists compete each year, drawn from schools spanning Iquique to Puerto Montt (the full length of Chile).
Chile does not currently participate in the IChO (International Chemistry Olympiad). The IChO official results database shows no participation record for Chile. Instead, Chile channels its top students to the OIAQ (Olimpiada Iberoamericana de Química), where the country participates regularly. At the 29th OIAQ (2025, Mexico), Benjamín Magaña won a bronze medal.
Key Websites¶
- Sociedad Chilena de Química (SChQ)
- XXIX Olimpiada de Química 2026
- Facultad de Ciencias Químicas, Universidad de Concepción
Competition Pipeline¶
The OChQ follows a three-stage elimination format: Online Preliminary → Regional → National Final.
Stage 1: Online Preliminary (September)¶
An online exam open to all registered high school students, typically held in late September. This serves as the initial screening round.
Stage 2: Regional In-Person Exam (October)¶
Top performers from the online preliminary advance to regional in-person exams held at university campuses across Chile:
- UMCE (Santiago)
- UFRO (Temuco / La Araucanía)
- UdeC (Concepción)
- UDA (Atacama)
The regional exam runs approximately 4 hours (09:00–13:00). In 2026, the UFRO regional round alone attracted 230+ students from 21 schools in the La Araucanía region.
Stage 3: National Final (November)¶
Approximately 68–70 finalists compete at a host university. The 2025 (XXVIII) final was held at Universidad de Concepción on November 22, 2025, and featured a 2-hour experimental exam with inquiry-based questions (preguntas de indagación) requiring students to design experimental procedures.
Categories: Originally three categories for 2nd, 3rd, and 4th year of secondary school (2° medio, 3° medio, 4° medio). A new category for 1° medio was introduced in 2026, expanding access to first-year high school students.
Gold, silver, and bronze medals are awarded to the top three in each category. Registration fees are tiered by school funding type (municipal/public: 5,000 CLP; subsidized: intermediate; private: up to 15,000 CLP per student).
Exam Topics and Difficulty¶
The OChQ tests chemistry at an advanced high school level:
Online preliminary: Broad general chemistry topics — stoichiometry, atomic structure, periodic table, chemical bonding, thermodynamics, kinetics, equilibrium, acid-base, electrochemistry, descriptive chemistry.
Regional exam: More challenging multi-step problems requiring integration of multiple concepts. Topics extend to introductory organic chemistry and complex equilibrium.
National final: The highest difficulty level, with a strong emphasis on experimental design and inquiry-based learning. The 2025 final featured a 2-hour practical exam where students designed experimental procedures rather than following prescribed protocols.
OIAQ Performance¶
Chile participates in the OIAQ (Olimpiada Iberoamericana de Química), the regional Iberoamerican competition. Detailed medal records for Chile across all years are not comprehensively available online, but confirmed recent results include:
| Year | OIAQ | Location | Results |
|---|---|---|---|
| 2025 | 29th | Toluca, Mexico | Bronze (Benjamín Magaña, Pontificia Universidad Católica de Chile) |
Benjamín Magaña, an undergraduate at PUC Chile, expressed interest in pursuing physical chemistry research and teaching after his OIAQ bronze medal.
IChO Participation¶
Chile has never participated in the International Chemistry Olympiad (IChO). The IChO official results database shows Chile's country page with zero data — no students, no medals, no participation years recorded. Chile is not listed among IChO participating nations.
The reason for this (whether by choice, lack of IChO membership, or logistical/financial constraints) could not be determined from available sources. The SChQ national olympiad does not currently serve as a selection pathway to the IChO.
Student Outcomes¶
National winners are recognized at closing ceremonies with medal presentations. The SChQ also honors outstanding teachers (e.g., Luz María Ramírez Caprile and Oscar Cifuentes Sanhueza in 2025).
The closing ceremony of the 2025 final featured a lecture on lithium and chemistry's role in the value chain, linking olympiad participation to real-world chemistry careers. Specific data on former participants' university/career trajectories was not found in publicly available sources.
History¶
- ~1997–1998: First Chilean Chemistry Olympiad held (2026 is the XXIX / 29th edition).
- 2025: Return to fully in-person national finals after pandemic disruptions. XXVIII final held at Universidad de Concepción.
- 2026: New 1° medio category introduced, expanding access to first-year high school students. XXIX edition.
The competition has grown to involve universities across Chile as regional hosts (UFRO, UdeC, UMCE, UDA, etc.). A ResearchGate paper (Balocchi et al., 2018) documented the design and development of the experimental test for the Chilean Chemistry Olympiads, indicating academic study of the competition format.