pH scale ILS

Pandora Sifnioti
Age range: 
14-16
Language: 
English
Level of difficulty: 
Easy
Level of interaction: 
High
Average learning time: 
2 didactic hours
Access rights: 
Creative Commons Attribution (CC BY)
Description: 

This Inquiry Learning Space is designed for young Chemistry students of lower secondary school (12-15 years old) and aims at introducing the pH concept and scale.

It is based on a pHET simulation which is simple to use and involves the characterisation of familiar solutions into acids or bases. Furthermore, it studies the effect of volume and dilution to the pH of a solution.

The benefit of conducting this lab virtually is that students can test liquids that are normally difficult to test in “real” labs, such as vomit and blood. It is also easy and quick to use and overcomes practical problems such as pH-meter calibration, need of multiple instruments and resources, lack of time and other educational difficulties, whilst at the same time offering a fun and informative introduction to the pH scale. 

During this activity the students are able to conduct three different experiments:

Experiment 1: pH measurement the pH of 11 familiar liquids and classification into acids or bases

In this experiment students “test” the pH of 11 different liquids from their everyday life, such as blood, spit, soda pop, battery acid and water, though the use of an electronic pH-meter, which they are supposed to classify into acids or bases. Through this activity they are also included to neutral solutions.

Experiment 2: Influence of volume to the pH.

In this phase the students test whether volume has an effect on a liquid’s pH.

Experiment 3: Influence of dilution to the pH.

In this experiment students test whether dilution (the addition of water) affects a liquid’s pH and note the difference between an acid and a base, as in both cases the pH approaches 7 (in the case of an acid in increases, whilst in the case of a base it decreases).

Throughout the activity the students are required to answer a number of questions that require critical thinking and link the concept of pH to real life (e.g. why does drinking soda pop help soothe a tummy ache).

Inquiry Learning Phases: 
Orientation (Orientation)
Conceptualisation (Conceptualisation)
Labs in use: 

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate...Read more

Lab owner: 
Archie Paulson,
Chris Malley,
Jack Barbera,
Kathy Perkins,
Laurie Langdon,
Patricia Loeblein,
PhET Interactive Simulations,
Wendy Adams
Language: 
English, German, French, Italian, Spanish, Polish, Dutch, Hungarian, Portuguese, Greek, Swedish, Czech, Bulgarian, Slovak, Danish, Finnish, Slovene, Estonian, Croatian, Latvian, Arabic, Turkish, Chinese, Bosnian
Age range: 
12-14, 14-16, 16-18, >18
Investigation (Investigation)
Labs in use: 

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate...Read more

Lab owner: 
Archie Paulson,
Chris Malley,
Jack Barbera,
Kathy Perkins,
Laurie Langdon,
Patricia Loeblein,
PhET Interactive Simulations,
Wendy Adams
Language: 
English, German, French, Italian, Spanish, Polish, Dutch, Hungarian, Portuguese, Greek, Swedish, Czech, Bulgarian, Slovak, Danish, Finnish, Slovene, Estonian, Croatian, Latvian, Arabic, Turkish, Chinese, Bosnian
Age range: 
12-14, 14-16, 16-18, >18
Conclusion (Conclusion)
Discussion (Discussion)
Apps in use: 

This app allows students to upload files, e.g., assignment and reports, to the Inquiry learning Space. The app also allows teachers to download the uploaded files.Read more

Category: 
Collaboration apps, General apps
App type: 
OpenSocial gadget
comments powered by Disqus

Create ILS

Create your own ILS and share it with your students and other teachers

Logout

Publish online lab

Are you a lab owner?
Publish your online science lab
in Golabz Repository

Publish

Newsletter

Interested in Golabz news
and upcomming events?
Sign up to our newsletter

Sign-Up

Get in touch

Do you have questions or
want to share your ideas?
Feel free to contact us

Contact