Title	: MEASURING TEMPERATURE

Aim	: To measure the temperature of solutions

Apparatus :
distilled water , tap water , solution q , dil. hydrochloric acid ,
aqueous ammonia , thermometer , glass beakers , measuring cylinder

Directions : Measure out 25 cm3 of hydrochloric acid into a glass beaker
and record the temperature . Quickly add 25 cm3 of the aqueous ammonia 
and observe the maximum temperature reached . Allow tap water to boil and 
record their boiling points . Using the ice determine the 
freezing point of water .

Results and Observations :

Questions  : 
During the recording of the boiling point of the liquids the thermometer 
was not allowed to touch the walls of the beaker . Why? 
How did you determine the boiling point using the thermometer ?
Give the precautions you have taken when using the thermometer .

MEASURING TEMPERATURE

Criteria    : MANIPULATION

using the measuring cylinder- 
keeping it on a level surface ; reading the meniscus at eye level ; 2 pts.
using the Bunsen- 
correct lighting procedures ; correct operating procedures ; 2 pts	  	
using the thermometer- ( a pt. subtracted for each of the following ) . 
stirring with thermometer ; touching the walls of beaker with the thermometer ; 
not immersing the bulb completely in solution ; 
waving the thermometer around to cool it ; playing with the thermometer : 6pts

Total = 10 pts.