General Catalogue Chemistry - BECO Internacional LTDA.

667 496
Apparatus for determining molar mass,
boiling method
The molecular weight of the dissolved material
is determined using the increase in the boiling
point of the solution over that of the pure solvent.
Scope of delivery
1 Boiling tube with 2 ST 19/26, 1 ST 14.5/23
1 ST 7/16
1 Air jacket
1 Immersion cooler with ST 19/26
1 Drying tube with ST 7/16
1 Beckman thermometer with ST 19/26,
zero point at the bottom,
range 5 K:1/100 . . . . . . . . . . . . . .666 173
1 Stopper ST 14.5/23
667 497
Apparatus for determining molar mass,
freezing point method
The molecular weight of a substance is determined
from the drop in the freezing point of a
solution with respect to a pure solvent
Scope of delivery
Equipment for determining molar masses according to Victor Meyer
Equipment list
Determination of molar mass according to Victor Meyer
Quantity Description Cat. No.
1 Base rail, 55 cm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 602
1 Universal bosshead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 615
1 Heating mantle for gas syringe . . . . . . . . . . . . . . . . . . . . . . . 667 491
1 Silicon stopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667 494
1 Gas syringe, 100 ml . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665 912
1 Flask with 2 GL 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667 493
1 Variable extra low voltage transformer D . . . . . . . . . . . . . . . 667 827
1 Pair of cables, 1 m, red and blue . . . . . . . . . . . . . . . . . . . . 501 46
1 Digital thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 209
1 Temperature sensor, NiCr-Ni . . . . . . . . . . . . . . . . . . . . . . . . 666 193
1 Base
1 Cooling vessel with PVC lid
1 Freezing tube with air jacket and ST 45/40
1 Adapter piece with ST 45/40 and
2 ST 19/26
1 Metal stirrer for cold bath
1 Metal stirrer for solution
1 Tongs
1 Thermometer for the cooling vessel,
-50 ... + 35 °C
1 Beckmann thermometer with ST 19/26,
zero point at the bottom,
range 5 K: 1/100 . . . . . . . . . . . . .666 173
665 296
Adapter
analysis methods
Determination of molar mass
Equipment for determining molar masses
according to Beckmann
Determination of molar mass according to
Victor Meyer and Gay Lussac's law
When determining the molar mass according to
Victor Meyer, the substance to be analyzed is
vaporized in a gas syringe, and the gas volume
which the substance subsequently assumes is
measured. As pressure and temperature are
known, the molar mass is determined using the
ideal gas equation on the basis of the assumption
that the substances behaves like an ideal gas.
With 2 GL 14; using this device, a temperature
sensor (> 666 193) can be inserted into any
gas syringe to enable measurement of the
exact temperature of the gas in the gas syringe.
When used in conjunction with the heating
mantle for gas syringe (> 667 491), the volume
of the gas can be determined as a
function of the temperature.
Application examples:
Determining the absolute zero point
Gay-Lussac's Law
Joule-Thomson Effect
667 493
667 496
Flask for determining molar mass
With 2 GL 14; the substance to be analysed is
heated by a heating mantle for gas syringes
(> 667 491).
LEYBOLD DIDACTIC · GENERAL CATALOGUE CHEMISTRY
667 497
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