Name________________________________________________      Date_____________

1.  Units of Measure – Weight, Volume and Length          Lab Report

 4.  How do your conversion factors (highlighted with the star *) compare with those in the Unit Conversion Tables on pp. vii and viii?

 Name________________________________________________      Date_____________

2a. Measuring Liquids                                                               Lab Report

1. Volume reading while standing ____________  Volume reading at eye level _______________

2. Volume in the graduated cylinder _________________.  How does this compare to the expected result (20 ml)?  If it differs, why?

3. Does the result equal exactly 100 ml?  Explain any differences.

2b. Density

1.  Length of cube side _____________cm.   Volume of cube (length³) _______________cm³.

     Cube weight _______________g.   Cube density _________________g/cm³.

2.  Volume of water ________ml.   Volume of water + cube ________ml. 

     Volume of cube _______ml.

3. Cube density ___________g/ml.  How does this number compare to your density calculated in g/cm³  from part 1 of this section (note 1cm³ = 1 ml)?

4.  Dry cylinder weight ___________           Full cylinder weight ___________ 

     Water weight ___________          Water density (g/ml) ______________.

5a.  How does the density of water that you calculated compare to the one supplied by your lab instructor?

5b.  If you mixed the water and oil together, which would you expect to float on top?  Why?

Name________________________________________________      Date_____________

3. Conservation of Mass in Chemical Reactions             Lab Report

                                                               a. NaHCO₃ + HCl               b. KI + H₂O₂

Before reaction:

   1.  Mass _{empty bag and pipette}             __________________       __________________

   2.  Mass _{bag, pipette, & reactants}           __________________       __________________

After reaction:

   3.  Mass _{bag,  pipette, products w/ gas}     __________________       __________________

   4.  Mass _{bag, pipette, products w/out gas}   __________________       __________________

Calculations:

   5.  Mass _reactants (= step 2 – 1)      __________________       __________________

   6.  Mass _{products w/gas} (= 3 – 1)       ___________________­­        __________________

   7.  Mass Difference

        _{Products – Reactants} (= 6 – 5)        ___________________­­       __________________

   8.  Was mass conserved?          ___________________­­       __________________

   9.  Mass of gas produced

        (= 3 – 4)                                ___________________­­       __________________

10.  What happened to the

        wood splint?                         __________________       __________________

11.  What gas was produced?      __________________       __________________

12.  What is the chemical equation for the reaction that you carried out in part A?

______________________________________________________________

13.  What is the chemical equation for the reaction that you carried out in part B?

______________________________________________________________

14.  If question 7 above is not equal to zero for either part A or part B, what might

                have been sources of error in this lab?

______________________________________________________________

______________________________________________________________

Name________________________________________________      Date_____________

4. Decomposition Reactions - Electrolysis                           Lab Report

1. What happened to the glowing splint in step 4?

2. What happened to the burning splint in step 5?

3. How much of the test tube at the anode filled with gas?

4. How much of the test tube at the cathode filled with gas?

5. What gas accumulated at the anode?  Why did this gas accumulate here?

6. What gas accumulated at the cathode?  Why did this gas accumulate here?

7. What was the ratio of the volume of the two gases to each other?

8. Is this consistent with the chemical equation for this reaction?

Name________________________________________________      Date_____________

5. Model Building                                                                        Lab Report

Name________________________________________________      Date_____________

5. Model Building                                                           Lab Report (cont.)

Name________________________________________________      Date_____________

6. Conductivity                                                                            Lab Report

1.  Test the following materials (in order) and rate them as a Strong Conductor, Weak Conductor or Non-Conductor.

2.  Is table salt an ionic compound or covalent molecule?  Explain why.  Did the salt conduct electricity in the solid form?  Why or why not?

3.  Is sugar an ionic compound or covalent molecule?  Explain why.

4.  Did your tap water conduct electricity?  Why did it (or why not)?

5.  Is your oil an ionic compound or covalent molecule?
 

Name________________________________________________      Date_____________

7. Formula Writing                                                                      Lab Report

1.  Write the name and formula of the compounds formed from the following ions.  The ionic charge (not shown) on some elements listed below can be calculated from the group number in the Periodic Table of Elements.  Metals form positive ions, nonmetals form negative ions.

Name________________________________________________      Date_____________

10a. pH of Common Substances                                        Lab Report

1.     In the table below, find the pH of the test solution and calculate the concentration of hydronium ions in moles/liter in each solution.  List each substance as a concentrated acid (pH 0-2), dilute acid (pH 2.1-6.9), dilute base (pH 7.1-12.9) or concentrated base (pH 13.0-14.0).

2.  How do your pH measurements compare with those listed in table 2 (p. 39) of the lab description?

Name________________________________________________      Date_____________

10b. pH of Over-the-Counter Drugs                                                           

1.         List the pH of each solution:                         2.  List the solutions in order of increasing acidity

3.   Which pain reliever would you use to avoid heartburn?

Name________________________________________________      Date_____________

11. Acid-Base Titration                                                              Lab Report

1. Concentration of base         ______________M

2. Run number                        ______________     ______________     ______________

3. Initial volume of base          ______________ml ______________ml ______________ml

4. Final volume of base           ______________ml ______________ml ______________ml

5. Volume of base used          ______________ml ______________ml ______________ml

6. Volume of base in liters       ______________l    ______________l    ______________l

7. Liters of acid titrated            ______________l    ______________l    ______________l

8. Acid concentration              ______________M  ______________M  ______________M

Calculate the concentration of the titrated acid using the equation below.

M_ACID ´ V_ACID  =  M_BASE ´ V_BASE

9. Known acid concentration   ______________M

    (Obtain from your lab instructor after all three trials are completed)

10.   How do your results agree with the known concentration of the acid solution?  Which trial agrees best?

11.   What were possible sources of error in your titration?

12.   Assuming you titrated the acid to a pH of exactly 7.0, what substances would remain in the flask after the titration is complete?  (Hint: write the equation of the reaction.)

Name________________________________________________      Date_____________

13. Manufacturing Aspirin                                                        Lab Report

1.     Weight of salicylic acid taken (subtract container weight)       ____________________ g

2.     Weight of beaker plus aspirin crystals                                    ____________________ g

3.     Weight of beaker                                                                     ____________________ g

4.     Weight of aspirin you obtained                                                ____________________ g

Since 9.00 g of salicylic acid would produce 11.73 g of aspirin under ideal conditions, you can calculate the percent yield by using the following formula:

% yield     =      weight of aspirin obtained     x     100

11.73 g

If you did not start with exactly 9.00 g of salicylic acid, consult your lab instructor.

5.  Percent Yield =                                                                        ____________________ %

6.   When aspirin gets old, a faint vinegar odor can be detected from the bottle, what is the chemical name for this odor?

7.  Why is aspirin sometimes sold as a buffered compound?

Name________________________________________________      Date_____________

14. Analgesics and Thin-Layer Chromatography            Lab Report

 1.  In the table below, calculate the R_f value for each component separated out of the standards and unknown.

 1.  Which standard (give the name) matched your unknown sample?

2.  Define the following terms (refer to the Manufacturing Aspirin lab #13):

      a)  antipyretic

      b)  nonsteroidal anti-inflammatory drug (NSAID)

      c)  Reye's Syndrome   

 3.  Which of the tested analgesics fall into the category of NSAIDs? 

4.  Which analgesic should not be given to children with fever who may have the flu or chicken pox?

Name________________________________________________      Date_____________

15. Making Soap                                                                          Lab Report

1.     Was the experiment successful (did you make soap)?  If not, what were the possible sources of error?

2.     What was the effect of the HCl on the soap lather?

3.     Did your soap lather in both tap and salt water?  If not, which did it not lather in?  Why?

4.     Where does the glycerol come from that is decanted with the salt-water rinse?

Name________________________________________________      Date_____________

16. Nutrients in Foods                                                               Lab Report

Carbohydrates

 Proteins

Name________________________________________________      Date_____________

 16. Nutrients in Foods                                                  Lab Report (cont.)

1.     What effect did boiling have on the starch?  Saliva?  HCl?  Explain why.

2.     What happens to starch in your food when you chew?

3.     Describe what trends you noticed in the food groups regarding starch content (did one food group seem to consistently contain more starches)?  Regarding protein content?

Name________________________________________________      Date_____________

17a. Fats in Food                                                                         Lab Report

1.     Record any color changes noted at each time interval in the table below.

Number of Minutes After Start of Experiment

2.     List the materials tested in order of relative degree of unsaturation (least to most) based on your experimental results.  Label the least unsaturated and the most unsaturated sample.

3.     Based on your findings and the lab write-up, which oil would be the healthiest to use in your cooking?  Why?

Name________________________________________________      Date_____________

17b. Fats in Food                                                                         Lab Report

 1.   Record the number of drops of iodine added to each fat in the table below.

2.     List the materials tested in order of relative degree of unsaturation (least to most) based on your experimental results.  Label the least unsaturated and the most unsaturated sample.

Name________________________________________________      Date_____________

18. The Cell                                                                                  Lab Report

1.     What kind of animal cell are you looking at?  Can you identify all of the structures illustrated in the lab diagram in the dry mount of an animal cell?  Draw a diagram of your observations below.

2.     Can you identify the cell wall and the chloroplasts in the dry mounted plant cell?  In the onion cell?  Diagram your observations below.

3.     Do the plant and animal cells differ in shape?  If so, describe how.  If not, why not?

Name________________________________________________      Date_____________

18. The Cell                                                                     Lab Report (cont.)

1.     Through which objective lens do you get the best view of the cheek (buccal) cells?  What is the total magnification using this lens?  Illustrate what you observe.

2.     What kind of cells are cheek cells?

3.  How many different organisms can you identify in the pond water?  Can you name any of them?  Describe how these organisms move.

Name________________________________________________      Date_____________

19. DNA and Protein Sequencing                                            Lab Report

 1.     DNA:

            a)  G G C G T A C G G C C T T T A A A A C A T A A C T T

            b)

2.     mRNA:

            a)

            b)

3.     Protein fragment sequence (find the strand with the stop and start codon):