pH Scale
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Topics
- pH
- Dilution
- Concentration
- Acids
- Bases
Description
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 whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!
Sample Learning Goals
- Determine if a liquid is acidic, basic, or neutral
- Place acids or bases in relative order
- Describe on a molecular scale, with illustrations, how the water equilibrium varies with pH
- Determine concentration of hydroxide, hydronium and water at a given pH
- Relate liquid color to pH
- Predict (qualitatively and quantitatively) how dilution and volume will affect the pH and concentration of hydroxide, hydronium and water
Version 1.2.16
Teacher Tips
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Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). |
Video Primer
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Teacher-Submitted Activities
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Authors | Level | Type | Subject |
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| pH Scale inquiry-based intro to acid-base |
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Trish Loeblein | MS HS UG-Intro |
Lab CQs |
Earth Science Chemistry Biology |
| PhET Sims Aligned to the Chemistry Curriculum |
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Julia Chamberlain | HS UG-Intro |
Other | Chemistry | |
| Alignment of PhET sims with NGSS |
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Trish Loeblein | HS | Other | Earth Science Physics Biology Chemistry |
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| How do PhET simulations fit in my middle school program? |
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Sarah Borenstein | MS | Other | Chemistry Biology Earth Science Physics |
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| pH Learning Goals by developement team (Inquiry Based) |
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Trish Loeblein, Laurie Langdon | Other | Other | Chemistry | |
| MS and HS TEK to Sim Alignment | Elyse Zimmer | MS HS |
Other | Chemistry Biology Physics |
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| On the molecular level, what is the difference between acids and bases? | Chris Justus | HS | Guided | Chemistry | ||
| What effect does dilution of an acid or base have on the pH of the solution? | Chris Justus | HS | Guided | Chemistry | ||
| Student Guide for PhET - pH Scale in html5 | Brian Libby | HS MS |
HW Guided |
Chemistry | ||
| pH Scale Guided Inquiry Activity | Tony Tracy | UG-Intro HS |
HW Lab Guided |
Chemistry | ||
| Exploring the pH Scale | Lyric Portwood | MS HS |
Guided | Chemistry | ||
| Introduction to acids & bases | Donna Brewster | HS | Guided | Chemistry | ||
| Preguntas de razonamiento para todas las simulaciones HTML5 |
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Diana López | HS K-5 MS UG-Adv UG-Intro Grad |
HW Discuss |
Mathematics Chemistry Astronomy Physics |
| Escala de pH, introducción a ácidos y bases con indagación |
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Trish Leoblien, traducción de Diana López | MS UG-Intro HS |
MC Guided |
Chemistry |
| ¿Cómo una disolución afecta los niveles de pH en ácidos y bases? |
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Joselyn Gianatasio, traducción Diana López | MS HS |
Guided | Chemistry | |
| Logaritmo e Função Logaritmo | Wedson Francelino Ribeiro Noronha, Francisco Régis Vieira Alves | HS UG-Intro |
Lab Discuss |
Mathematics | ||
| Atividade de simulação de Ácidos e Bases | Marcelo Henrique Freitas Saraiva Guerra; Ana Karine Portela Vasconcelos | MS | Guided | Chemistry |
Browse legacy activities.
| Windows 7+ | Mac OS 10.10+ | iPad and iPad Mini with iOS | Chromebook with Chrome OS |
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Safari 9+, latest version of Firefox, latest version of Chrome.
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| Design Team | Third-party Libraries | Thanks To |
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