Lifelong Learning Programme

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Title of the Experience
Colorful flames
Name of the teacher
Josep Bernardo i Vera
Country where it took place
School typology
High Secondary School
Thematic Area
Experience typology
Type of contact
Description of the Experience
The emission spectra are characteristic of each element and allow its identification. This property can be qualitatively determined by a simple experience that allows recognize the presence of certain metals by the color formed by exposing its compounds to a flame.
The flame test for the detection of metals (sodium, calcium, lithium, strontium, barium, potassium, copper ...) is based on the fact that the outer electrons of the metals or their ions undergo electronic transitions (when they are heated by the flame ) that cause light emission of the characteristic emission spectrum of each metal.
To make this experience it is necessary to prepare different saturated solutions of sodium chloride, calcium, lithium, strontium, barium, potassium, copper... in few milliliters of ethanol. Each of these solutions are separately poured into different crucibles. Set fire to them and flames of different colors appear, corresponding to the characteristic light emission spectrum of each metal.
Compounds and metals have the characteristics colors of the metals and allow a qualitative detection of these metals and compounds in mixtures.
This experience allows students to better understand the emission expectra.

Comments on this Teachers Experience

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Date: 2015.10.06

Posted by Maria Deptuła- Chocholska (Polska)

Myślę,że najważniejszym przesłaniem tego przykładu jest PRAKTYKA- czyli doświadczenie. Nauki ścisłe często bazują na teorii, która dla uczniów jest nudna. Gdyby to doswiadczenie było tylko opisane w podręczniku na pewno nie wzbudziłoby emocji.


Dissemination Seminar in Florence

31 October 2015 The seminar has been held in ITIS “A. Meucci” one of the schools involved within Goerudio project activities. Its main aim was to promote the results of the project toward a broad sample of stakeholders even overcrossing the number of people directly involved in the production of project outcomes. This purpose has been totally achieved especially thanks to the participation of students and teachers coming from different schools or from other classes instead of those ones directly involved within the project activities.