Lab Report Format

Title

 (Reflects the purpose.  NOT Lab 1)

Purpose:           States why you are doing the lab.  What are you

                                 trying to accomplish?

Materials:           Lists equipment and chemicals used in the lab.

Procedure:           Numbered step by step instructions on

                                 how to do the experiment.

Results:        Contains the data table:  an organized chart listing the

                         descriptions of the data collected, the measurements

                         made and the units.  Be sure data is written to reflect

                          the proper precision.  The descriptions should be very

                          specific as to what was measured (ex. Dish, lid and salt. 

                          NOT:  First, second, third).

Discussion:  A paragraph of complete sentences analyzing the experimental errors the could occur during the lab.  The first sentence should identify the possible procedural error or emphasize the importance of a particular procedural step.  The second sentence should tell how the data collected would be affected by this error.  Be specific—state which item and whether the effect would raise or lower the recorded measurement.  The third sentence should state how to avoid or correct the error and prevent it from occurring.  Do NOT use errors made due to inadequacies of the operator (ex. I could have read the balance wrong).

Calculations:  This is where calculations are specifically written out.  Each data entry in the calculation should be well labeled with a description of what it represents as well as a unit.  If the lab requires a percent error calculation, use the following formula:    l experimental value   -   accepted valuel       x   100

                                                                                        accepted value

Conclusion:       Use sentences to answer what you set out to determine. (I.e.  Refer back to the purpose of the lab).  Include any % errors.  Omit opinions as to whether or not you like the lab.

Note:  If a graph is included, be sure to label all parts, title, xy axis with units, number the axis so that it spreads out the data, label your points, know whether you are connecting your points or drawing an average pattern.