Design of Low-Cost Equipment for the Study of a Chemical Reaction

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Participate and share : Poster

Martín Adame Ríos  
Nour Harb  
Dr. Salvador Guadalupe Hernández Vargas  
Mía Nieto  
María José Pedroza  
Raúl Rosales Tenorio  

We propose the use of low-cost equipment to replace an UV-Vis spectrometer to study the decay of phenolphthalein as a simple experimental demonstration and valuable tool for the learning of chemical kinetics in different educational levels ranging from junior high to undergraduate students.

Audience: Professional developers, Teachers, Teacher education/higher ed faculty
Skill level: Intermediate
Attendee devices: Devices not needed
Participant accounts, software and other materials: Microsoft Excel and calculator
Topic: Teacher education
Grade level: PK-12
Subject area: Science
ISTE Standards: For Educators:
  • Stay current with research that supports improved student learning outcomes, including findings from the learning sciences.
  • Model and nurture creativity and creative expression to communicate ideas, knowledge or connections.
  • Provide alternative ways for students to demonstrate competency and reflect on their learning using technology.
Additional detail: Student presentation

Proposal summary

Purpose & objective

In this project the assistants will learn how to produce with a LED and a photoresistance an equipment to measure the rate of a chemical reaction using low cost materials. The results will be contrasted with the ones obtained used with an spectrophotometer UV-Vis. The students and the assistants can perform the data analysis in order to obtain information such as the reaction order and the chemical rate constant for the system adjusting in excel the data properly.


1. General overview of chemical kinetics
2. General overview of the device employed
3. Data analysis and performance of the reaction.
4. Discussion and final results

Time:50 minutes
Laboratory experience, peer to peer interaction

Supporting research

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Dr. Salvador Guadalupe Hernández Vargas, Cumbres International School Lomas