Postlab 3 Electrochemistry Galvanic Cells.docx - EXPERIMENT 2 ELECTROCHEMISTRY GALVANIC CELLS Accuracy of Equipment Constants Error Analysis Significant

Postlab 3 Electrochemistry Galvanic Cells.docx - EXPERIMENT...

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EXPERIMENT 2: ELECTROCHEMISTRY - GALVANIC CELLS Accuracy of Equipment Constants Error Analysis Significant Figures Total Points = Earned Total 32 34 Lab Data: The data you collected in lab may be entered in groups or as a single entry. Once a 'data group' opens up, enter data in every open text box before clicking the Submit button in the side panel. Once you Submit and Confirm your lab data, click the Next Problem button to proceed down the page where you can enter answers to lab calculations, essays, balanced equations, and multiple choice questions. If you Submit / Confirm incorrect data , you can correct your data with the Change Incorrect Data link at the top of this page. Note: If you change / reset your data the program remembers any points you lost on calculations using the incorrect data and deducts those points from your total grade. Calculations: When you enter answers to calculations, you must pay attention to the tolerances established by your Instructor which the program uses to grade your answer. If you are expected to round your answer to the correct number of Significant Figures, you will be notified in the side panel; otherwise, you need only enter a number that falls between the correct number minus the tolerance and the correct number plus the tolerance. The tolerance for any Chem21Labs calculation is found in the side panel once you open a calculation by clicking the Next Problem button. If the Tolerance is ± 2 in 3 rd SF, it means that if your answer falls between the correct answer minus 2 in the 3 rd Significant Figure AND the correct answer plus 2 in the 3 rd Significant Figure, Chem21Labs will count it as correct. In this example, the '3 rd SF' is the MINIMUM number of significant figures required for the answer. If the tolerance is not ± 0 in a certain Significant Figure, it is recommended that you use two more Significant Figures than required as long as your answer is within the range created by the tolerance. Enter only the number for Lab Data and Calculations - never the unit. Essays: short answers to questions can be entered at any time by clicking the Edit link associated with the question. If you don't click the link, the essay editor will open automatically after clicking the Next Problem button if it is next in the "sequence". If you "click ahead" in the lab to enter essay answers, the Next Problem button may not open a previous data box or calculation box - you can fix this by reloading the page or clicking the Back to Main Menu link and clicking on the assignment again.
To use scientific notation you will use the E notation. For example, 4.5 x 10 -3 would be entered as 4.5

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