1. Measurement and Lab Equipment

2. Test Tube
A small glass container used to view chemical reactions or to heat small amounts of a substance

3. Pipet
Like a dropper, it is used to transfer and dispense small amounts of a liquid.

4. Liquid volume is measured in mL
Beaker
A wide-mouthed container used to transport, heat, and store substances.
Can be used to measure liquid volume only if measurements do not need to be precise.
Always read from eye level.
Notice that there are two scales on the beaker! Use the one that zero is at the bottom (right) if you are measuring the liquid.
Liquid volume is measured in mL

5. Lab Practice
Take a beaker from the drying rack on the center lab table and place 50mL of water into the beaker.
Get it approved by your teacher.
Empty the water and return the beaker to the drying rack.
Return to your seat.

6. Flask
A narrow-mouthed container used to transport, heat, or store substances; often used when a stopper is required.
Can be used to measure liquid volume only if measurements do not need to be precise.
Always read from eye level.

7. Graduated Cylinder Used to measure volume very precisely.
First, determine what each line means.
Always read from eye level.
Always read the bottom of the meniscus if the graduated cylinder is glass (the dip).

8. Graduated Cylinder Practice
So what is the reading from this graduated cylinder?
How many decimals are acceptable here?
The reading should be 52.8 ml where the 8 is the estimated digit.

9. What is the volume of this object?
Water Before: 30.0mL
Water After: 40.0mL
=10.0 mL
Difference is 10mL
Object’s Volume: 10cm3

10. Which of the following is more precise?

11. Balance Measures the mass of objects and substances.
NEVER PUT YOUR HAND ON THE BALANCE PAN!!!

12. To measure mass of objects:
Remove anything that is on the balance pan.
Turn the balance on to “zero out” (this is also called “tare”). This means that the reading should be 0.00 when there is nothing on the pan. If it is not zero, hit the tare button.
Place the object on the pan.
Record the reading in grams (g).

13. To measure the mass of powders:
Remove anything that is on the balance pan.
Place a sheet of paper on the pan.
Turn the balance on to “zero out” or press the tare button. This means that the reading should be 0.00 when there is paper on the pan.
Place the powder on the paper.
Record the reading in grams (g).