The biurette and pipette can't just be washed with water because a thin film of water will remain on it, which would change the concentration of either the unknown or the known. Either way this is a problem. As for the others, the concentration won't be changed so it doesn't matter if some water...
Successful STAT (at least 150/200)
As a guide: minimum UAI of 91.9 for 2009 (ATAR equivalent is 92.55)
^ from the USYD website o.o
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Bachelor of Pharmacy - Future Students - The University of Sydney