Basic Tools and Lab Safety

INTRODUCTION TO LABORATORY SAFETY
The objectives of this introductory laboratory course argon:
To familiarize you with the basic principles of laboratory work and safety in the laboratory.
To understand hypothesis testing using scientific methods.
To analyse the data you have obtained and draw conclusions.
To present the experiment, your data and conclusions in a clear and scientific fashion.

1. BASIC TOOLS AND SAFETY
A. Laboratory Glassware
Borosilicate chicken feed is the most commonly used material for laboratory weapon such as beakers, flasks, pipets, etc. It is stable to hot solutions and to quick changes in temperatures.
B. volumetric Glassware
Volumetric flasks are designed to double back an dead on target volume at the specified temperature (20oC or 25oC) when the pot of meniscus (the concave curvature of the upper surface of peeing in a column caused by capillary follow start or surface tension) just touches the marked fill clientele across the neck of the flask.
Pipets are used to transfer a particular volume of solution.There are twain common types:
Volumetric (transfer pipet) 100-0.5 mL.
beat pipet (serological pipet) 25-0.1 mL.
Volumetric ones are used for accurate measurements, because they are designed to monger only one volume.



Measuring pipets, on the other hand, are marked at diametrical volume intervals and they are not as accurate as volumetric pipets. Some graduated pipettes are blow out types. The final volume of solution must be short-winded out from the tip (A frosted ring near the top out of pipets indicates that the last drop will be blown out). The others deliver a specific maximum volume from between the two lines that are farthest apart (Mohr type).
Corrosive or toxic solutions must never be pipetted by mouth.
-Micropipets: A classification of micropipets are available for measuring microliter volumes.
-Burets: Their principal use is in titrations. During titration a standard solution is added to the solution containing the sample until...If you want to get a full essay, order it on our website: Orderessay



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