scientificdrawings safety symbols
TRANSCRIPT
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Lab Tools
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2D DRAWINGS OF LAB TOOLS
When you perform an investigation and then, afterwards, write down what happened; you may need to draw how the apparatus was arranged.
To save time in science, there are special ways to draw the apparatus. Can you predict what the diagrams will look like for the apparatus below?
Separating funnel
Delivery tube
Filter funnel
Clamp and stand
Round bottom flask
Flat bottom flask
Tripod & gauze
Bunsen burner
Conical flask
Test tube
Beaker
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TEST TUBE
Used to hold, mix or heat
small quantities of
liquids or solids.
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BEAKER
simple container for stirring, mixing and heating liquids commonly used in many laboratories.
Most also have a small spout (or "beak") to aid pouring.
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CONICAL FLASK
Used for mixing, heating, cooling, dissolving,
precipitation and boiling.
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BUNSEN BURNER
• Apparatus for supplying heat • The gas used is methane which reacts with oxygen from air, forming carbon dioxide and water that escape as gases.
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TRIPOD AND GAUZE
tripod
gauzeIs used as a platform to hold and support glassware, such as beakers and flasks while heating in experiments .
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CLAMP AND STAND
stand
clampHolds test tubes,
Round bottom flasks for distillation experiments ,and other equipment
such as burettes; which
are most often used in titration experim
ents.
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FUNNEL AND FILTER PAPER
Funnel
Filter paper
used for separating solids from liquids via filtering, Using filter
paper.
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ROUND BOTTOM & FLAT BOTTOM FLASK
Used for heating liquids. The design of the flat-bottomed flask allows it to stand alone on the lab bench.
• Used for heating or boiling liquids.• Can’t stand alone on lab bench so should be used with clamp and stand.• More efficient heating than flat bottom flask.
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SEPARATING FUNNEL
Used to separate liquids that don’t dissolve. Ex: oil and water
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DELIVERY TUBE
• The delivery tube converts any liquid or gas flowing through a Rubber
tube into a free flow.
• A rubber tube can be connected to or from the top of the tube.
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How to use a Bunsen burner?
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LABELING A BUNSEN BURNER
Air Hole
Base
Chimney
CollarRubber tubing
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HOW TO LIGHT A BUNSEN BURNEREvery time you use a Bunsen burner, you should follow these steps:1 Check the hose for breaks and holes. DO NOT use the Bunsen burner if you find any breaks or holes. Give it to your teacher.2 Connect the hose to the gas tap but do not turn it on yet.3 Check that the air-hole in the collar of the Bunsen burner is CLOSED.4 Light a match and hold it a little distance (about 2 cm) above the top of the chimney of the Bunsen burner.5 Turn on the gas at the gas tap.6 The Bunsen burner will now light and give you a yellow flame.7 Turn down the gas supply at the gas tap until you have the size of flame needed for your experiment.8 IF YOUR BUNSEN BURNER GOES OUT, TURN OFF THE GAS.
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BUNSEN BURNER FLAMES
• Air hole open, so lots of air mixes with the gas
• Noisy, blue flame• Very hot flame• Used for heating things quickly
Roaring flame:
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• Air hole half-open, so some air mixes with the gas
• Light blue flame, which is quieter than the roaring flame
• Flame is quite hot• Used for heating liquids,
especially if you are using a boiling tube
Medium flame:
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• Air hole closed, so hardly any air mixes with the gas
• Quiet, bright yellow flame• Flame is not as hot as the
medium flame• Not used for heating, because
the flame leaves a layer of soot on things
Medium flame:
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SAFETY SYMBOLS
This symbol means that a substance is self-reactive and can explode if not
handled correctly.
Explosive
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Harmful or irritant
This symbol warns that a chemical may harm your health if you do not
use it properly. The word ‘irritant’ means that the chemical may give you a rash if you get it on you or make you choke if
you breathe it in.
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Corrosive
This symbol tells you that a chemical will attack your skin if you get it on
you.
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Highly Flammable
This symbol warns you that a chemical will catch fire easily.
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Environmental danger
This symbol means that there is some type of living thing in an area which
may make you ill.
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Toxic
This symbol means that a chemical is poisonous. Poisons can kill.
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Biohazard
This symbol means that if used wrongly, it could cause harm to the
environment.
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Eye protection must be worn
This symbol reminds you to wear safety glasses or goggles when
working in a certain area or using particular pieces of equipment or
chemicals.
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Wash your hands
This symbol reminds you to wash your hands after you have done an
experiment.
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Electric shock
Will cause electric shock if handled incorrectly.