Analysis of Alum Lab:
• Don’t heat too strongly at first,
to avoid too much hydrate
bubbling out of the crucible
• ALL Steps — ALWAYS use
crucible tongs (no fingers).
Analysis of Alum Lab:
• Scales do not measure
accurately when they are not at
room temperature (make sure
everything is cool before placing
on scale).
• Make sure scales are measuring
grams (not ounces) and set to
zero before measuring
Analysis of Alum Lab:
•
•
•
Always test the hot crucible/lid before
assuming it is cool (don’t get burned!)
Keep lab goggles on at ALL TIMES.
Clean up station completely; wash hands.
Analysis : Show all calculations
for #1, 3; Write complete
sentences for #2, 3, 4, 5
Conclusion:
--short statement of the final
results from the lab (what was
the complete formula for alum,
what was your % error)
--short statement about the
significance of the lab (why it
is important for a chemistry
student to conduct this lab)