Физическая химия, свойства материалов

 
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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

Production of metal alloys

What you can learn about
  • Preparation of alloys
  • Brass and bronze
  • Alloys are mixtures not compounds
 
Детали

Продукт No: P1143901

U-tube manometer

Principle

The suitability of a U-tube partially filled with liquid as an instrument for measuring pressure (manometer) it is to be demonstrated.

 

Benefits

  • Optimised for demonstration experiments: Transformation from horizontal into vertical direction
  • Very good visibility: Big ...
 
Детали

Продукт No: P1296700

Hydrostatic pressure

Principle

The dependence of the hydrostatic pressure on the depth of immersion h and on the density ρ of a liquid, and the relationship between the pressure p and the quantities h and p, are to be demonstrated.

Benefits

  • Optimised for demonstration experiments: Transformation from ...
 
Детали

Продукт No: P1296800

Communicating vessel

Principle

lt is tobe proved, that the heights of a (homogenous) liquid in vessels which are connected to each other are the same.

The principle of the water-level will then be demonstrated.

 

 
Детали

Продукт No: P1296900

Hydraulic press

Principle

The principle of how a hydraulic system functions is to be worked out on the basis of a model of a hydraulic press.

 
Детали

Продукт No: P1297000

Artesian well

Benefits
  • Optimised for demonstration experiments: Transformation from horizontal into vertical direction
  • Very good visibility: Big devices on uniform background
  • Strong Magnets (at least 10 N) allow a safe mounting and therefore a very easy handling
  • Magneto-adhesive measuring scale ...
 
Детали

Продукт No: P1297100

Density determination by measuring buoyancy

Principle

lt is to be shown, how the density of solid and liquid substances can be determined from a measurement of the buoyancy.

 

Benefits

  • Optimised for demonstration experiments: Transformation from horizontal into vertical direction
  • Very good visibility: Big devices on ...
 
Детали

Продукт No: P1297300

Discharge velocity of a vessel

Principle

The behaviour of the speeds at which water flows out of a vessel through outlets at various heights is to be examined.

 
Детали

Продукт No: P1297400

Pressure in gases

Principle

An enclosed amount of gas is to be compressed by the pressure of a plunger, and an investigation is to be made as to which relationship thereby exists between the pressure of the gas and the pressure force acting on a defined area.

 

Benefits

  • Optimised for demonstration ...
 
Детали

Продукт No: P1297600

Determination of the molar mass of a liquid



Principle

The molar mass of a liquid is to be determined by evaporating a liquid at constant temperature and pressure, and measuring the volume of  vapour  formed using a calibrated gas syringe.

Benefits

  • For both demonstration and student experiments
  • Simple ...
 
Детали

Продукт No: P3010501

Determining the molecular weight of a polymer from intrinsic viscosity measurements



Principle

The viscosity of a liquid is effectively determined by the strength of the intermolecular attractive forces. In the case of solutions, the viscosity of the solvent can alter significantly depending on the type and concentration of the solute. Due to their size, ...

 
Детали

Продукт No: P3010601

Determination of the enthalpy of vaporisation of liquids

Principle

The vaporisation of a liquid occurs with heat absorption. To determine the enthalpy of vaporisation, a known mass of the liquid which is to be investigated is vaporised in a special vaporisation vessel in a current of air. The quantity of heat absorbed, which corresponds to the ...

 
Детали

Продукт No: P3020461

Partial molar volumes

Principle

Due to intermolecular interactions, the total volume measured when two real liquids (e.g. ethanol and water) are mixed deviates from the total volume calculated from the individual volumes of the two liquids (volume contraction). To describe this non-ideal behaviour in the ...

...

 
Детали

Продукт No: P3020501

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