Glasswares Flashcards
The most commonly used type of glass used
Borosilicate
Why is Borosilicate the most commonly used type of glass used
- naturally transparent
- can withstand high heats and thermal shock
What type of glass does Borosilicate contain
boron trioxide
advantages of using Borosilicate glass
o Can withstand high temperatures easily
o Inert to almost all chemicals
o Can withstand high agitation & thermal stress
o Extremely low coefficient of expansion
o Corrosion-resistant
Other term for Quartz Glass
Fused Silica
most uncompromising equipment found in a laboratory
Silica glass
How is Quartz Glass created
created at high temperatures of 2,000C by melting sand.
Silica glass is chemically _____ and _______ with the reagent it holds. This gives you _______ and ______ results of your experiment
pure
does not react
clear and concise
reasons why you should include silica/quartz glass in your lab equipment list
o High thermal shock resistance
o Superior to borosilicate
o Extremely Pure material
o Chemically Inert
o Splendid Optical Transmission (unique characteristic that differs from other glass)
glass equipment that is tinted dark brown or amber to protect light-sensitive chemical compounds from getting altered by i______________, v___________ and u____________
infrared radiation, visible light and ultraviolet radiation.
glass equipment that is tinted dark brown or amber.
ACTINIC GLASS
benefits of using actinic glass:
o Light sensitive (unique characteristic that differs from other glass)
o Inert to chemicals
o Store compounds safely
o Experiments sensitive to UV radiation
This glass is extremely fragile and has a low melting point. It is almost impossible to repair and does not have high thermal shock resistance.
SODA LIME GLASS
properties of soda lime glass that makes it useful in laboratories
o Chemically stable
o Highly Inert
o Extremely Workable
o Affordable
These are simple cylindrical containers, in sizes from ___ ml to _____ ml. One of the commonest glass equipment found in labs, they are used for holding solids and liquids, and for pouring and decanting liquids.
Beakers
10 ml to 4000 ml.
Uses of Beakers
- For preparation of solution/reagents.
- Transferring liquid to another container
- transfer a small amount of reagent for use in procedures.
Used when you want to swirl contents without spilling. They are fitted with stoppers.
CONICAL FLASKS/ERLENMEYER
what is the difference between an erlenmeyer and florence flask
An Erlenmeyer flask has a flat bottom, so used for direct heating while a Florence flask can have either a round or a flat bottom and can be used for direct heating as well with a heating mantle (placed under Erlenmeyer flask).
Uses of Erlenmeyer
- For performing titrations
- for boiling the solutions, since evaporation is minimum because of the conical shape.
- These are also suitable for storage of liquids
This is flat-bottomed pear-shaped vessel with long narrow necks and Specific volume mark, fitted with stopper
VOLUMETRIC FLASKS
Volumeteric Flask Uses
- To precisely measure one specific volume of liquid.
- Used to prepare a solution of known concentration.
Uniform thickness and withstand mechanical and thermal shock
TEST TUBES
Uses of Test Tubes
- used to store, mix and heat chemicals
- useful in observational procedures (like urinalysis or determination of carbohydrates in biochemistry).
This is straight long cylindrical tube with graduations on its side.
GRADUATED CYLINDER
They are generally more accurate and precise for measuring volume than flasks, but it is a semi-accurate liquid measuring vessels because of their wide bore.
GRADUATED CYLINDER
Use of Graduated Cylinder
For rapid measurement of liquid volume.
How to read volume in graduated cylinder if:
- clear liquid
- turbid liquid
- lower meniscus
- upper meniscus
Differentiate the 3 types of glass pipettes
o Mohr
o Volumetric
o Serological
o Mohr – measuring pipette
o Volumetric – has valve in the middle; usually 10 ml
o Serological – measuring pipette; graduation is extend up to the tip
Has rubber bulb attached to the top of the glass tubing, tapered at the tip.
PASTEUR PIPETTE
use for pasteur pipette
Uses:
(1) Used in qualitative determinations, where few drops of specimen is added in reagent.
(2) Used in separation of serum and plasma from cells.
uses of funnel
Uses:
(1) These are used for pouring liquids, chemicals or solutions into container.
(2) Separation of solids from liquids.
(3) Separation of liquids from liquids.
Are devices used typically in analytical, quantitative chemistry applications for measuring liquid solution.
BURETTE
This is a glass container which is used when the volume of liquid is small, but you need a higher surface area. It is good for crystallizing and evaporation and can also be used as a beaker.
WATCH GLASS
Absorb moisture from a substance.
DESICCATORS
They perform the same task as desiccator. The _________ is a more direct way of removing moisture.
DRYING PISTOLS
Small bottles that are used for storage.
VIALS
a piece of laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities.
SEPARATORY FUNNEL
other terms for SEPARATORY FUNNEL
separation funnel, separating funnel, or colloquially sep funnel
an apparatus or item of equipment used to change the physical state of a substance from its gaseous to its liquid state.
GLASS CONDENSER
used in procedures involving organic liquids brought into the gaseous state through heating, with or without lowering the pressure applying vacuum)-though applications in inorganic and other chemistry areas exist.
GLASS CONDENSER
