Just to list a few that are
generic:
Equipment - Either wrong equipment used or the
equipment does not measure to the proper level of precision. If you used a beaker to
measure 30 mL instead of a graduated cylinder you could only measure to .0 mL where as
with a graduated cylinder you could measure to the
.00mL
Contamination of chemicals if it is
chemistry.
did not conduct the proper number of trials
normally 3 is acceptable
Rounding of data to
early
Humidity exposure of items such as salt that obsorb
water vapor from the atmosphere.
It would help to know the
experiment but I hope these help.
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