laboratory operations and techniques
DESCRIPTION
Laboratory Operations and Techniques. are the proper ways of manipulating/utilizing the apparatus in the laboratory. A. Handling liquid. 1. transferring into a narrow-mouthed container (such as test tube, graduated cylinder, flasks). 2. transferring into a wide-mouthed container - PowerPoint PPT PresentationTRANSCRIPT
Laboratory Operations andTechniques
are the proper ways of manipulating/utilizing the apparatus in the laboratory.
A. Handling liquid
1. transferring into a narrow-mouthed container (such as test tube, graduated cylinder, flasks)
2. transferring into a wide-mouthed container (such as beaker)
B. Handling Solids/Powder
1. transferring into a wide-mouthed container
1. transferring into a narrow-mouthed container
C. Heating Using a test tube
Using other containers (beaker, flask, etc.)
D. Measuring a liquidMeasuring the Volume of Liquid – measure at an eye level
Measuring Solid
1. Measuring the volumea. Irregularly-shaped solid – use Water
Displacement Method
Regularly-shaped solid v= l x w x h
v= 20cm x 8cm x 16cm
v= 2560 cm3
Measuring the mass
Measuring the Temperature
E. Filtration
F. Diluting Acid
Always add the acid to the water. Otherwise the acid can splash you and get on your skin and also if it is a concentrated acid, as you dilute it, a lot of heat is generated, and you want the larger volume of water to be able to absorb that heat.
D. Determining the acidity and alkalinity of a chemical
Blue litmus paper turns red - acidic Red litmus paper turns blue - basic