Experiment #25 I, II, and III Grading Rubric

If you look on Page 6 of the syllabus, you will see the grade breakdown for Experiments 25-I, 25-II, and 25-III. It also indicates that the storeroom will be grading each of these lab reports. You will not have to hand in any formal report for these labs, just the report sheet with proper flow chart and the white card attached to it, which your TA has up at their lab station.

The grade breakdown is as follows:

25 Group I

10 pts: Lab Notebook
In the lab notebook section you should write out an outline of the procedure (ask your TA what they expect for this section as they are assigning the grade and their styles will vary). You should also write down all observations in the lab notebook, which will lead you to your conclusions. You need to sign the bottom of each page and your TA also needs to initial and date each page. Once both of you sign off you will hand your carbon copy sheets to your TA.

20 pts: Prelab Assignment
This prelab assignment will be graded by your TA at the beginning of the lab period. They will point out any places where you might need to modify your procedure or give any helpful hints. You can complete this in your lab notebook or on the sheet handed out to you.

100 pts: Proper Identification of Cations Present
Each cation is worth 50 points for Group I. You will get points for correctly identifying whether a cation is present or absent. For example, if you think both lead and silver are present in your sample and only lead is present, then you will receive 50 pts for properly identifying lead and 0 points for improperly identifying silver.

25 Group II

10 pts: Lab Notebook
20 pts: Prelab Assignment
120 pts: Proper Identification of Cations Present
There are 4 cations you are responsible for in Group II. Each one is worth 30 points.

25 Group III

10 pts: Lab Notebook
20 pts: Prelab Assignment
120 pts: Proper Identification of Cations Present
There are 4 cations you are responsible for in Group III. Each one is worth 30 points.

The report sheets are turned in to the TA in the same fashion as Group I.

The deadline for handing in unknowns for Group I, II, and III is 5:30 pm on Jan. 22nd.