Laboratory Equipment The tools you use to increase

Laboratory Equipment The tools you use to increase your understanding

Beakers • Used for – Pouring, storing, mixing, heating, dispensing • NOT used to measure • Has a “beak” to aid pouring

Test Tube • Used for storing, mixing, heating • NOT for measuring • Should be held with tongs, clamps or a ring-stand clamp NEVER with your hands

Flask • • • No beak Used for storing, heating, etc. Not for measuring Many different shapes Should not be held by hands

Graduated Cylinder • Used to measure liquids • Not for reactions • Read from the curve of the meniscus

Meniscus Curved shape of a liquid stored in a cylinder Caused by: adhesion between the liquid and its container cohesion between particles of the liquid

Bunsen Burner • Turn on gas FIRST • Control gas and air to create a nice blue cone of flame • NEVER put glassware into the flame, as the glass will weaken and then melt

Ring Stand w/ Clamp • Used as a steady base • Many different clamps and instruments will attach to the stand

Triple-Beam Balance

Triple-Beam Balance • Used to measure mass • Moving the weight farther from the pan increases the leverage • Be sure to zero the balance for each mass • Use paper to keep materials from sticking to the balance pan

Let’s see what you’ve learned… • Answer the following questions about laboratory equipment using your keypad Ready? 10

Which is best for measuring liquids? 1. 2. 3. 4. Beaker Graduated Cylinder Flask Crucible 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20

What is this? 1. 2. 3. 4. Graduated Cylinder Beaker Triple-beam Balance Test Tube 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20

What is this NOT used for? 1. 2. 3. 4. Heating Measuring Pouring Storing 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20

What is this? 1. 2. 3. 4. Graduated Cylinder Funnel Triple-beam Balance Test Tube 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20

What should you do to a triple-beam balance before weighing a substance? 1. 2. 3. 4. Use new paper Zero the balance Move all weights to zero All of the above 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20

What is this effect called? 1. 2. 3. 4. Meniscus Musculum Mensa Mosca Quito 10 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15 16 17 18 19 20