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Biochemistry Laboratory > Glasswares > Flashcards

Glasswares Flashcards

1
Q

The most commonly used type of glass used

A

Borosilicate

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2
Q

Why is Borosilicate the most commonly used type of glass used

A
  • naturally transparent
  • can withstand high heats and thermal shock
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3
Q

What type of glass does Borosilicate contain

A

boron trioxide

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4
Q

advantages of using Borosilicate glass

A

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

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5
Q

Other term for Quartz Glass

A

Fused Silica

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6
Q

most uncompromising equipment found in a laboratory

A

Silica glass

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7
Q

How is Quartz Glass created

A

created at high temperatures of 2,000C by melting sand.

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8
Q

Silica glass is chemically _____ and _______ with the reagent it holds. This gives you _______ and ______ results of your experiment

A

pure
does not react
clear and concise

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9
Q

reasons why you should include silica/quartz glass in your lab equipment list

A

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)

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10
Q

glass equipment that is tinted dark brown or amber to protect light-sensitive chemical compounds from getting altered by i______________, v___________ and u____________

A

infrared radiation, visible light and ultraviolet radiation.

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10
Q

glass equipment that is tinted dark brown or amber.

A

ACTINIC GLASS

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11
Q

benefits of using actinic glass:

A

o Light sensitive (unique characteristic that differs from other glass)
o Inert to chemicals
o Store compounds safely
o Experiments sensitive to UV radiation

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12
Q

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.

A

SODA LIME GLASS

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13
Q

properties of soda lime glass that makes it useful in laboratories

A

o Chemically stable
o Highly Inert
o Extremely Workable
o Affordable

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14
Q

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.

A

Beakers
10 ml to 4000 ml.

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15
Q

Uses of Beakers

A
  • For preparation of solution/reagents.
  • Transferring liquid to another container
  • transfer a small amount of reagent for use in procedures.
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16
Q

Used when you want to swirl contents without spilling. They are fitted with stoppers.

A

CONICAL FLASKS/ERLENMEYER

17
Q

what is the difference between an erlenmeyer and florence flask

A

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).

18
Q

Uses of Erlenmeyer

A
  • For performing titrations
  • for boiling the solutions, since evaporation is minimum because of the conical shape.
  • These are also suitable for storage of liquids
19
Q

This is flat-bottomed pear-shaped vessel with long narrow necks and Specific volume mark, fitted with stopper

A

VOLUMETRIC FLASKS

20
Q

Volumeteric Flask Uses

A
  • To precisely measure one specific volume of liquid.
  • Used to prepare a solution of known concentration.
21
Q

Uniform thickness and withstand mechanical and thermal shock

A

TEST TUBES

22
Q

Uses of Test Tubes

A
  • used to store, mix and heat chemicals
  • useful in observational procedures (like urinalysis or determination of carbohydrates in biochemistry).
23
Q

This is straight long cylindrical tube with graduations on its side.

A

GRADUATED CYLINDER

24
Q

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.

A

GRADUATED CYLINDER

25
Q

Use of Graduated Cylinder

A

For rapid measurement of liquid volume.

26
Q

How to read volume in graduated cylinder if:

  • clear liquid
  • turbid liquid
A
  • lower meniscus
  • upper meniscus
27
Q

Differentiate the 3 types of glass pipettes

o Mohr
o Volumetric
o Serological

A

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

28
Q

Has rubber bulb attached to the top of the glass tubing, tapered at the tip.

A

PASTEUR PIPETTE

29
Q

use for pasteur pipette

A

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.

30
Q

uses of funnel

A

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.

31
Q

Are devices used typically in analytical, quantitative chemistry applications for measuring liquid solution.

A

BURETTE

32
Q

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.

A

WATCH GLASS

33
Q

Absorb moisture from a substance.

A

DESICCATORS

34
Q

They perform the same task as desiccator. The _________ is a more direct way of removing moisture.

A

DRYING PISTOLS

35
Q

Small bottles that are used for storage.

A

VIALS

36
Q

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.

A

SEPARATORY FUNNEL

37
Q

other terms for SEPARATORY FUNNEL

A

separation funnel, separating funnel, or colloquially sep funnel

38
Q

an apparatus or item of equipment used to change the physical state of a substance from its gaseous to its liquid state.

A

GLASS CONDENSER

39
Q

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.

A

GLASS CONDENSER

Biochemistry Laboratory (8 decks)

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