1. How to Keep Your Lab Journal
How to Keep Your Lab Journal * if you do not have a notebook, do this on regular paper and transfer it for homework

2. On The First Page CHEMISTRY-Howe N244 _________ Period ___ YOUR NAME
YOUR PERIOD

3. 2. Number Your Pages
-In the upper right hand corner, number the first 25 pages right now.
-Do not number the back side of the pages.
-You will NEVER write on the back side of the page 1
CHEMISTRY-Howe
N244
_________
Period ___

4. 3. Table of Contents
 -Your Table of Contents should include the title of the lab and the page number in your journal where that lab begins. - 2
Table of Contents
Title Page
Title Page
Table of Contents
Safety Rules
Beaker and Flask

5. 4. Lab Safety Contract
    Staple the Lab Safety Rules Into Your Notebook. Onto Page 3
I will pass out the safety contract and pass around the stapler 3
Safety Rules Folded in Half

6. All entries into lab notebook must be made in ink, NEATLY (BLUE or BLACK ink ONLY!). NO PENCILS (EVER) I will not grade it. -Use a ruler to draw any tables/charts. -If a mistake is made, cross it out neatly with a single line and initial above it - DO NOT USE WHITE-OUT

7. Lab grades:
Total-100 points:
Background/ Materials and Safety- 25
Procedures-25
Graphs/ Diagrams/ Questions-25
Conclusion-25

8. 4. Beaker and Flask Lab
    4
Beaker and Flask Lab
Question: Are the lines on beakers and flasks reliable enough to measure out liquids in a laboratory experiment?
Material:
1 of each beaker : small & large
1 of each flask: small and large
Colored water in a beaker
Graduated cylinder
Foam block
Meter Stick
Irregular shaped object
Scale

9. 4. Beaker and Flask Lab Procedure: 4
   
Procedure:
1. Teacher Demo with the 50 ml BEAKER
2. Take the smaller beaker and fill water up to the first line
3. Record the value of the volume of water in the first column of the chart
4.. Carefully transfer the water into a graduated cylinder, read the actual volume of water and record into the second column
5. Calculate the absolute error [Observed- Actual], record onto the third column of the chart.
6. Calculate the percent error: Absolute error/ actual x 100%
7. Repeat for each beaker AND each flask

10. 4. Beaker and Flask Lab Beaker Absolute error Percent Error
    
Beaker
Observed first Volume Line
Actual Volume measured in graduated cylinder
Absolute error
Percent Error
50 mL
___mL
___ mL
Flask

11. 4. Beaker and Flask Lab
    
1.. The _____________ has the most accuracy for measuring liquids in the lab
2. What was your average percent error for the beaker? _____ for the flask? _____
3. Make a bar graph of your results

12. 4. Beaker and Flask Lab Beaker and Flask Lab Determining Density
    
Beaker and Flask Lab
Determining Density
Procedure:
1. Find the volume of the labeled object [piece of foam] (l x w x h)
2. Weigh the object using the balance
3. Calculate the density using the density formula (D=m/v)
4. Weigh the odd-shaped object
5. Take the odd-shaped object and find its volume by pouring 20 mL into a graduated cylinder and then placing the object into the water. Read the new line made on the graduated cylinder
6. Calculate the density

13. 4. Beaker and Flask Lab Beaker and Flask Lab Density:
   
Beaker and Flask Lab
Density:
1. Volume: ______
2. Mass: ________
3. Density Calculations
4. Mass of rubber stopper: ________
5. Volume: _____
6. Density Calculations
7. Why did you have to use the graduated cylinder to find the volume of the odd-shaped object?

14. 4. Beaker and Flask Lab Beaker and Flask Lab Conclusion:
   
Beaker and Flask Lab
Conclusion:
Write what you figured out about this lab.
Overall summarize this lab from start to finish like you were explaining it to someone who was absent (length should be at least 2-3 paragraphs.
Use complete sentence for full credit- this section is worth 25 points to your lab grade
Completed lab and conclusion will be due on Friday