Glassware

Question 1

used for heating and sterilization, commonly used for constriction of reagent bottles

Answer 1

High Thermal Resistant/Borosilicate Glass

Question 2

high resistance to alkali

Answer 2

Boron-free/Soft Glass

Question 3

special alumina-silicate glass that has been strengthened chemically than thermally

Answer 3

Corex

Question 4

poor resistance to high temperature; used to make disposable glassware

Answer 4

Flint glass

Question 5

used for light sensitive reagents

Answer 5

Low-actinic glass

Question 6

Are frequently used for preparation of standard solutions

Answer 6

Volumetric flasks

Question 7

Wide straight sided cylindrical vessels that are available in many sizes; used generally for mixing and for reagent preparation

Answer 7

Beaker

Question 8

Are often used for preparing reagents and titration purposes

Answer 8

Erlenmeyer Flask

Question 9

comes in different sizes depending on their intended use; chemical reaction medium

Answer 9

Test tubes

Question 10

A long and straight sided cylindrical piece of glassware with calibration.

Answer 10

Graduated cylinder

Question 11

Long cylindrical graduated pipettes with stopcock; used for titration

Answer 11

Biuret

Question 12

Another type of volumetric glassware used extensively in the laboratory.

Answer 12

Pipettes

Question 13

Types of Pipettes

Answer 13

Transfer pipettes
Graduated or Measuring pipettes

Question 14

Transfer Pipette

Answer 14

Volumetric pipette
Pasteur pipette
Automatic pipette

Question 15

Graduated Pipette

Answer 15

Serologic Pipette
Mohr pipette

Question 16

An instrument that uses force to separate solid matter from a liquid suspension

Answer 16

Centrifuge

Question 17

Heating solutions in a Test tube

Answer 17

-Fill the test tube with half full of liquid to be heated
-Use a test tube holder to hold the test tube
-Make sure the test tube is positioned 45 degrees angle when heating it
-Place it over the flame passing it back and forth so that the flame strike the tube just below at the liquid level but never at the bottom of the tube
-Never point the open end of the tube to anyone while heating the solution in it
-Never look directly inside the tube that is being heated
-Never smell the solution directly from the test tube, wave your hand towards you —-identify the smell

Question 18

Handling Solids

Answer 18

-To get solids from a reagent bottle, spoon it with a clean and dry spatula (a dirty spatula will contaminate the portion being taken and all the reagents inside the bottle)
-When weighing solid chemicals, put the reagent on a watch glass
-Do not place the reagent directly on the pans of the balance
-Do not return excess reagents into its original container

Question 19

it is the process of separating solid particles from liquid by pouring the mixture in a filter paper

Answer 19

Filtration

Question 20

solid left on the filter paper

Answer 20

Residue

Question 21

– the liquid portion at the bottom of the container

Answer 21

Filtrate

Question 22

It is the process of pouring the liquid portion of the mixture to another container while not disturbing the solid particles that settle at the bottom of the container

Answer 22

Decantation Filter

Question 23

– solid at the bottom of the container

Answer 23

Residue/sediment

Question 24

the liquid portion on top of the solution

Answer 24

Decantate