C4 pH value of beverages (teacher instructions) © Siemens Stiftung 2015 CC BY-SA 4.0 international

C4 pH value of beverages (teacher instructions)


Experimentation instructions for Experimento | 10+:
Background information on the content and practical information on conducting the experiment "pH value of beverages – How acidic is it in the stomach?".

English, Spanish (CREA), German
Text (173.1 kByte)
This is a typical introductory experiment. The experimentally acquired finding that “humans can tolerate extremely acidic beverages" leads to the conclusion that “it must be very acidic in the stomach". The question is “why?". This automatically introduces us to the topic of the digestive tract and digestion. Depending on the age group, the teacher can and must deal with the topic in more detail. Apart from the topic of digestion in biology lessons, students’ basic knowledge of acids and bases can be put to excellent use in the experiment in chemistry lessons. The materials supplied allow eight groups of students to conduct the experiments simultaneously.

• Observe the safety information in the instructions as well as the applicable safety guidelines for your school.
• All materials mentioned in the instructions will have to be purchased directly from commercial sources.
There are no other media directly related to this file.
Biology; Chemistry
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
Middle/high school
Acids; Base (chemistry); Digestive organ; Enzyme; Health; Nutrition; Stomach
Siemens Stiftung Media Portal
Georg Frie, Prof. Dr. Claudia Nerdel for Siemens Stiftung
© Siemens Stiftung 2015
Stay up-to-date!

About four times a year, we inform you about new media on this portal as well as current studies and events related to OER and STEM.

Media Portal newsletter – register now

About four times a year, we inform you about new media on this portal as well as current studies and events related to OER and STEM.

*Required fields


Liebe Nutzerin, lieber Nutzer,
El Portal de Medios – das spanische Medienportal – ist umgezogen und heißt nun CREA.
Auf CREA finden Sie weiterhin hochwertige Medien für den MINT-Unterricht und vieles mehr.

Dear User,
El Portal de Medios - the Spanish Media Portal - has moved and is now called CREA.
On CREA, you will continue to find high-quality media for STEM education and much more.

Estimado usuario, estimada usuaria,
El Portal de Medios – en español – ha sido trasladado y ahora se llama CREA.
En CREA seguirá encontrando medios de alta calidad para la enseñanza de STEM, y mucho más.

Zu CREA wechseln / Switch to CREA / Cambiar a CREA
CREA - El Portal de Medios para la Enseñanza STEM

Hierbleiben / Stay here / Quédate aquí:
Fenster schließen / Close window / Cerrar ventana