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Water quality - contamination with heavy metals

Principle

Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanic or similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlled by these enzymes may ...

 
Детали

Продукт No: P0990162

Electrolysis of water

Principle

In the case of simple electrolysis (for example electrolysis of water) an electrolysis cell consists of two identical electrodes (mostly graphite or platinum), which are immersed in an (electrolyte) solution. In this experiment sodium hydroxide solution is used as an electrolyte ...

 
Детали

Продукт No: P1028200

Introduction to the electron transfer reaction

Principle

In this experiment students examine the reaction of metals in salt solutions.  Students put iron or iron wool into a copper sulfate solution and solid copper into an iron sulfate solution.  With this experiment students learn that metals can be deposited from a salt ...

 
Детали

Продукт No: P1033000

Melting and freezing curve of sodium thiosulphate

Benefits
  • Especially understandable and didactic prepared experiment descriptions including protocol

  • Future-proof lessons: Integration of tablets in digital science lessons

  • Enhanced motivation of students due to the use of the intuitive measureAPP

  • Increase of media ...

    ...
 
Детали

Продукт No: P1044668

Melting and freezing of sodium thiosulphate with SMARTsensesodium thiosulphate

 
Детали

Продукт No: P1044669

Chemical process: synthesis and analysis

 
Детали

Продукт No: P1131701

Separation of a mixture of liquids by distillation

Principle

The separation of liquid mixtures can be achieved by a simple distillation.  In this experiment a liquid mixture of water and ethanol is distilled by using a distillation column. Various fractions of the distillate are obtained with the help of a rotatable receiver. The ...

 
Детали

Продукт No: P1132500

Air - a mixture of the gases oxygen and nitrogen

Principle

 In this experiment the  composition of air is investigated. Therefor soild copper is heated on air. Copper combines with the oxygen of air and forms copper oxide. If this reaction is performed in a closed apparatus and the air volume is measured before and after the ...

 
Детали

Продукт No: P1133400

Rapid combustion- explosions

Principle

This experiment shows that the combustion rate depends on the degree of dispersion and the mixing with oxygen (or the oxidizing agent). Students observe that metals such as aluminum and magnesium are  non-flammable in compact form or when they burn , they burn ...

 
Детали

Продукт No: P1133700

The law of conservation of mass in chemical reactions

Principle

This experiment confirms the law of conservation of mass by the precipitation of calcium carbonate in the vessel according to Landolt. For this experiment two solutions with the starting material  are filled separately into two limbs of a vessel.  Afer that ...

 
Детали

Продукт No: P1134300

The law of definite proportions in chemical reactions

 
Детали

Продукт No: P1134400

Osmosis - dependence of the osmotic pressure on the concentration

Principle

Osmosis describes the phenomenon that solvent molecules move through a partially permeable membrane into a region of higher solute concentration. Thus, the concentration of solute is equalized on both sides. The experimental set-up consists of seven chambers that are filled with ...

 
Детали

Продукт No: P1135700

Enthalpy and entropy as driving forces of chemical reactions

Principle

The experiment examine the terms enthalpy and entropy as the main forces of chemical reactions. Students perform the reaction of zinc and hydrochloric acid as an example of an exothermic reaction. The heat, which is developed by the raction, is measured with a thermometer. The ...

 
Детали

Продукт No: P1136300

Metastable chemical systems and energy of activation

Principle

This experiment shows that exothermic reactions start not always spontaneous when two (or more) substances are mixed together. Students realize that no reaction occurs when the reactants (in solid state) are mixed together. The solids usually begin to react with each ...

 
Детали

Продукт No: P1136400

Properties of lithium, sodium and potassium

Benefits
  • Experimental literature available for pupils and teachers: Minimum preparation time
  • Hazard assessment for pupils and teachers available
  • Easy teaching and efficient learning using the available interactive experiment literature
...
 
Детали

Продукт No: P1137300

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