1. Basic Lab Techniques

2. A. Meterstick Measure your lab book in inches and centimeters
Mathematically convert inches to centimeters
Show your work!
Determine area of your lab notebook

4. B. Graduated Cylinder
Determine the volume of water in the graduated cylinder sitting out.
Determine the volume of water contained in your largest test tube.

6. C. Thermometer Calibration
Set 250mL beaker on hotplate, ~half full of DI water
Periodically check temperature
Carefully stick thermometer in the water without touching the beaker walls
Record b.p.
Place 50mL of ice in a 250mL beaker and cover with DI water.
Located against the wall
Wait 15 minutes for equilibration
Record temperature
Record b.p.

7. C. Thermometer Calibration
Determine true boiling point at the observed atmospheric pressure.
CURRENT PATM = inHg
(e ) 𝑏.𝑝. 𝑐𝑜𝑟𝑟𝑒𝑐𝑡𝑖𝑜𝑛= 760𝑚𝑚𝐻𝑔− 𝑃 𝑎𝑡𝑚 ∗(0.037 °𝐶 𝑚𝑚 )
This will be the value used to correct part D
(d) True b.p. = 100.0°C – b.p. correction
Graph observed temperatures vs. true temperatures
Title graph, label x-axis and y-axis, scale the axes

8. D. Calibration of Pipet Obtain 40mL of DI water in 150mL beaker
Weigh empty, dry 50mL Erlenmeyer flask
Tare the balance
Record the temperature of the water on lab
Pipet exactly 10mL of water into the flask
Weigh flask with water
Determine the volume of your pipet

9. D. Calibration of Pipet
𝑑= 𝑚 𝑣
Units:
liquids: 𝑔 𝑚𝐿 𝑠𝑜𝑙𝑖𝑑𝑠: 𝑔 𝑐𝑚 3

12. E. Density of Antifreeze
Weigh dry 50mL flask
Record mass
Pipet 10mL antifreeze into flask
Record mass of flask with antifreeze
Repeat
Calculate density of antifreeze

14. Summary Post lab questions due with lab Work in groups of two or three
Turn in one lab report for the group
Answer the post lab questions individually and attach all to the lab report
Take all measurements and readings
Do calculations last or out of lab