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Unit 2 practical scientific procedures and techniques
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Unit 2: Practical Scientific Procedures and TechniquesKeeping up the standards
Unit 2: practical scientific
produces and technique
Study of cooling curves
Aim : to find out the accuracy of the thermometer, to study the
cooling curves of paraffin wax , to study cooling curve of steric
acid and it’s rate of cooling
Name - xxxxxxxxxxx
1
, Unit 2: Practical Scientific Procedures and Techniques
Keeping up the standards
Calibration and accuracy
Method:
Using ice:
1) A beaker was filled with ice cubes, and then some water was put
in the beaker.
2) The water was stirred and left to sit for 3 minutes.
3) The ice was stirred again, and then thermometers (digital and
alcohol) was placed in it.
4) After 3 minutes, the reading on the thermometer was 0
This reading was recorded of results, and
the thermometer was offset.
Using boiling hot water:
1) A beaker of water was boiled.
2) Once it was boiled, the thermometers (digital and alcohol) were
both put in the water. No part of
the beaker was touched.
3) After 3 minutes, the readings on the thermometers were read and
recorded on a table of results.
Digital thermometer
2
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