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1. Obtain mass of Excedrin tablet
1. Obtain mass of Excedrin tablet
mass_exc.mp4analytical balance
Turn on balance and wait for it to read 0.0000 g
Add weighing paper and tare balance
Add Excedrin tablet to paper and wait for reading to stabilize
Record mass (all digits are significant)
For the remote lab: TAs will provide a starting Excedrin mass
For the remote lab: TAs will provide a starting Excedrin mass
IN-LAB #3-4...
IN-LAB #3-4...
Calculate your theoretical mass recoveries of ASP, ACE, and CAF.
Calculate your theoretical mass recoveries of ASP, ACE, and CAF.
- Use the provided Excedrin tablet mass and the calculated theoretical % recoveries from the pre-lab...
Ex. Pre-lab calculation... x% of ASP in Excedrin: 250 mg ASP in 675 mg Excedrin
New calculation: How many mg of ASP are in your given Excedrin mass?
Consider these values to be the starting masses for each component
HEADS UP! Certain steps in the protocol will lead to product loss – keep track of the mass that was lost for each component. Then, calculate the mass recovered by subtracting the total mass lost from the starting mass
Ex. if starting mass of CAF = 5 mg, and total mass of CAF lost from two transfer steps = 3 mg, then mass of CAF recovered = (5 – 3) mg = 2 mg
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