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Microbial fuel cell
Microorganisms can supply electrons by decomposing organic materials and in this way generate a potential difference. For example, a biofuel cell can function as a battery.
The document contains instructions for use that describe how to make a …
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Educational videos: Overview document
This document contains several educational videos divided by subject:
- chemistry,
- biology,
- entrance exams,
and by theme. Almost all of the chemistry and biology curriculum for the third grade finality is covered in a Dutch video.
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The equilibrium constant Kc is not dimensionless
The equilibrium constant Kc is a fundamental quantity in solving chemical equilibrium problems.
Many secondary school chemistry textbooks use a dimensionless concentration fraction, which they usually represent with the symbol K. Both the …Translated by
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Scientific method: Schema
A diagram of a scientific method. The following steps are taken during the investigation:
- observation,
- research question & hypothesis,
- research or experiment,
- data or analysis,
- conclusion or result.
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Electron microscope: Task
This learning resource contains an assignment about electron microscopes. To better understand the material, your students watch two videos that illustrate the possibilities and operation of electron microscopes.
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Fire safety: Assignment bundle
Individual assignment bundle on fire safety: assignments on fire prevention and control, safety and first aid for burns.
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Lab material: Puzzle
This is an exercise on the names of the lab materials.
On this first sheet you see twelve images of objects from the lab, each with a number from 1 to 12. On the next sheet (answer sheet) you see twelve boxes with the names of the material. …
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Biomass conversion: Practical
The Biomass Conversion lesson series consists of a practical with accompanying questions and assignments.
In the practical, the students see how wood contains cellulose, and they show that cellulose in turn consists of glucose. Students become …
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Using BookWidgets Scientific Calculator: Guide
This is a guide to the BookWidgets scientific calculator. The students initially do not find this a useful calculator because they are not used to working with it and there are quite a few buttons on it that they are not familiar with.
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Electrolysis in a potato: Practical
Use a potato and copper electrodes to perform electrolysis. Copper oxidizes at the anode, water present in the potato reduces at the cathode. You can detect H2 there and observe with an indicator that a base is being formed.
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Chemical arithmetic: Practical
This document contains the instructions for the students.
I gave each pair a different combination of volume of 1 mol/l sulfuric acid solution and a certain mass of sodium carbonate, some having one in excess and others having the other. The amount …
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Qualitative and quantitative analysis of hydrates: Practical
In this practical, it is quantitatively determined how many water molecules bind per salt molecule of a hydrate (for example that of copper sulphate). It is also qualitatively demonstrated that a hydrate has a different color than its …
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