Procedure, Analysis – PASCO Xplorer-GLX Users’ Guide User Manual
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M e l t i n g P o i n t D e p r e s s i o n
Procedure
1.
Remove the frozen solutions from the freezer.
2.
Connect the temperature probes.
a)
Connect the temperature probe measuring the pure water ice to Temper-
ature Port 1 on the left side of the GLX.
b)
Connect the other probe to Temperature Port 2.
3.
Press
to start data collection.
4.
Set up the Graph to display both temperature measurements.
a)
Press
to return to the Home Screen; press
to open the Graph.
b)
Press
to open the Graphs menu; press
to select Two Measure-
ments mode.
c)
Press
to automatically scale the Graph.
5.
Continue data collection until both solutions have reached 5 °C. Press
to stop data collection.
Analysis
Describe the temperature versus time plots of both solutions. How are they simi-
lar? How do they differ? Which solution melts at a lower temperature?
Graph in Two Measurements mode
displaying both temperatures
F1
F4
4
ghi
F1