In your discussion you should make a conclusion and then explain how your experimental results and observations support your conclusion. The points below should help you identify the information you have available from this experiment to support your conclusion. Your 2-3 page discussion report should include:

a. A claim. Based upon the purpose of your experiment, what claim can you make using your experimental evidence?

b. A table of your results. i. Experimental results for the heat of reaction for each reaction (use tables as appropriate)

(1) magnesium oxide with hydrochloric acid

(2) magnesium metal with hydrochloric acid

ii. Calculated heat of formation of magnesium oxide.

c. Discussion of your results.

i. Write the balanced chemical equations with phase designations for the three chemical reactions described in the introduction.

ii. Show how the three balanced chemical equations combine to give the reaction for the formation of magnesium oxide from the elements in their natural states using Hess’s Law.

iii. Use a sample calculation to show how you determined your results.

iv. Explain how your experiment results support your claims.

v. Explain how your results with the known materials validate your procedure.

vi. Explain discrepancies between expected and experimental results

d. Uncertainty and Error in measurements.

i. Identify at least three (3) possible sources of uncertainty and error in this experiment.

ii. Use evidence from your laboratory notebook to evaluate the validity of these sources of uncertainty.

iii. Discuss the error sources you have evaluated.

iv. Discuss how the direction of each source of error affects the results.

v. Discuss the magnitude of the error in your result.

vi. What changes could you make to the procedure to minimize the sources of error?

e. Supporting references that demonstrate the validity of your method.

NOTE: I’ll send you the data base when the work is assigned.