Some water was put into beakers of different sizes. The beakers were then heated
above burners of different sizes as shown below
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Answer:
ABORATORY work has special importance in the learning of science as scientific
principles develop and grow on the basis of laboratory work. Chemistry is
an experimental science; the concepts learned in the theory classes are
better understood through experimentation. Laboratory work provides an
opportunity to observe many of the chemical phenomena under controlled
laboratory conditions and workout a problem through the method of inquiry. In
other words, it provides you with ample opportunity to become a keen observer
and to draw inferences and explain results.
The training in laboratory work helps to develop skills for handling apparatus
and equipment and carry out experiments. In this way, the experimental work
helps to promote scientific temper and adopt a cooperative attitude. Working in
the laboratory provides a platform for trying novel and creative ideas and giving
them concrete shape.
Before you become familiar with the scientific procedures and experimental
skills and start working in the laboratory, you should be well acquainted with
the chemistry laboratory. You should notice the facilities provided in the
laboratory and on your working table.
You will notice that your table is provided with a water-tap, gas-tap, Bunsen
burner spirit lamp/kerosene lamp, a reagent shelf and a bin for disposing waste
material. You will find that some reagents are kept on the shelf fixed on the table
while some reagents are kept on the shelf fixed on sidewalls. Reagents kept on
the shelf of the table are frequently required while those on the shelf fixed on
walls are less commonly used. Besides the facilities on the table, you will see
that there are exhaust fans fitted on the upper portion of the wall opposite to the
doors and windows and are placed close to the level of the ceiling. This facilitates
the exhaution of harmful fumes and circulation of fresh air in the laboratory.
For this purpose, there are also enough number of windows in the laboratory.
Keep these open while working. A fume cupboard is provided in the laboratory
for performing those experiments in which fumes are produced.
It is strongly advised that you should become fully familiar with your
chemistry laboratory, laboratory practices and procedures, and more importantly
the precautions to be taken while working in the laboratory.
The environment in the chemistry laboratory is somewhat special in the sense
that it can be a place of joy, discovery and learning. It can also become a place of
frustration and danger. Frustration – if you come unprepared and neglect
recording the important data properly, and danger – if you do not follow the
precautions properly in conducting the experiments where potential danger existing
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