1.2 a science laboratory

8/8/2019 1.2 a Science Laboratory

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1.2

ScienceLaboratory

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LaboratorySafety Rules and

Precautionspg5


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1. You should only enter a

science laboratory withyour teachers

permission.


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3. You are not allowed to

enter the preparation

rooms and stores.


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4. You must not take out

apparatus or chemicals

from the laboratory.


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5. You should only use

apparatus and chemicals

with the teachers

permission.


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6. All the apparatus and

chemicals must only be

used for the purpose

instructed by the

teacher.


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7. Materials must be

handled correctly, for

example, bottles should

not be carried by the

neck.


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8. You must not taste any

chemicals unless your

teacher instructs you to

do so.


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9. You must always check

the label on the bottle to

make sure that you are

using the correct

chemical.


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10. Should a chemicalaccidentally come into

contact with your mouth,you should spit it out and

wash your mouth withplenty of water.


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11. Should a chemical come

into contact with your

skin or clothing, wash

thoroughly with water.


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12. You must report all

accidents and injuries

such as cuts and burns to

your teacher

immediately.


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13. You should not play in

the laboratory.

14. You should not play

with apparatus andchemicals.


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Laboratory Safety Rules


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Laboratory Apparatus

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For heating chemicals

crucible


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To contain chemicals

Test tube


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For evaporating liquid from asolution

Evaporating dish


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To use as a stopper for test

tubes or conical flasks

Cork/ Rubber stopper


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To hold test tubes

Test tube holder


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To transfer small quantities

of liquids


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To hold specimen forobservation under a microscope


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To measure time

Stop watch


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To contain chemicals and

liquids

Beaker


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To contain chemicals and

liquids

Conical flask


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To contain chemicals used

in preparing gases if the

process requires no heating


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Round-bottomedflask

To contain chemicals used

in preparing gases if the

process requires heating


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To filter mixtures ofsolids

and liquids


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stand

To support apparatusduring heating


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gauze

To conduct excess heat away


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To provide a flame

Portable

laboratory burner


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To hold the test tubes in a

vertical position


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To stir solutions in acontainer


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To hold the

apparatus while

experiments are

being done

Retort stand and retort clamp


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To measure the volumeof solutions accurately

burette


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To contain gas


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To hold hot objects

Crucible tongs


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To measure the volume

of solutions accurately

pipette


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To measure the volumeof solutions accurately


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To measure temperature

Thermometer


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To support a small article likecrucible while heating


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Test tube brush

To wash test tube


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Spatula

To transfer small quantitiesof solid chemical


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Filter paper

To separate solids fromliquids


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Watch glass

To contain small amount ofchemical


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Dropper

To transfer small quantitiesof liquid


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Using a BunsenUsing a Bunsen

burnerburner


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Air-hole

Collar

Barrel

Gas inlet

base


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Proper ways of using a

Bunsen burner

1. Close the air-hole by

adjusting the collar


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Bunsen burner

2.Strike a match, bring

the lighted match over

the barrel and turn on

the gas tap


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The flame is yellow and

irregular in shape

Luminous flame


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Bunsen burner

3.Open the air-hole slowly.


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The colour of the flame

changes to blue

Non-luminousflame


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Bunsen burner

4.Turn off the gas tap

after use.


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Alcohol


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Hazard symbolsHazard symbols

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Corrosive

Hydrogen peroxide,

concentrated hydrochloric acid

and sodium hydroxide

Destroy

living tissues


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Highly flammable

White phosphorus, yellow

phosphorus, petrol, kerosene,

ethanol

Burns easily


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Toxic/poisonous

Mercury, lead, sodium cyanide,

hydrogen sulphide

Cause harm

or death()


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Harmful or irritant

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Ammonia, chlorine, chloroform

Cause rashes

and discomfort

to the body


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Radioactive

Uranium, thorium, radium

Releases

radiation

1.2 a science laboratory

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