Gravimetric Determination of Arsenic Procedure
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 Click File > Load Homework > Quantitative Analysis > Gravimetric
Determination of Arsenic > OK > Problem Description
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 Click on Gravimetric Determination of Arsenic Procedure Template
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Writing the Laboratory Procedure
 REFER TO THE RUBRIC WHEN
WRITING THE PROCEDURE!
 Under Gravimetric Determination of Arsenic, Replace “Name” with student names
(first and last)
 Under Procedure, write a detailed explanation of how you will conduct your
experiment. Write a detailed explanation of how you will conduct your experiment.
Describe the exact steps you will take to conduct the experiment so another
investigator, not familiar with your work, can correctly perform the experiment by
using your procedure as a guide
 Under Data, carefully design your data format so you can record all relevant
observations accurately and in a way that is easy to read.
 Under Analysis, analyze the data.
M=
𝑚𝑜𝑙
𝐿
Hints
 You need to find the mass of arsenic [As] in your sample, not
arsenate [AsO43-(aq)]
 You cannot measure the amount of aqueous ions. The Problem Description gives
you a reaction that produces a solid product that can be measured.
 Make sure that you demonstrate in your procedure that you reacted all of the
arsenate. [Think - limiting & excess reactants: What does a limiting reactant limit?]
 You need to calculate the amount of arsenic from your mass of silver arsenate solid.
 Maximum Containment Level of arsenic 0.010 ppm = 1 x 10-5 g As/kg sample
Gravimetric Determination of Arsenic Procedure
Experimental
Design
3
2
1
0
Experimental
design is wellconstructed
solution to the
problem.
Experimental
design is adequate
to solve the
problem, but leaves
some unanswered
questions.
Experimental
design is relevant
to the problem, but
is not a complete
solution.
Experimental
design is not
relevant to the
problem.
Procedure
Procedure is listed Procedure is listed Procedure does not
in clear steps. Each
but is not in a
accurately list the
step is numbered logical order and/or
steps of the
and is a complete
is difficult to follow.
experiment.
sentence.
Data
Data are complete
and accurate,
including numbers,
units, and
substances where
appropriate.
Data are
incomplete and/or
contain several
errors
Data are not shown
and/or are
inaccurate.
Some calculations
are shown and the
results are correct
and labeled
appropriately.
Some calculations
are shown and the
results labeled
appropriately.
No calculations are
shown and/or
results are
inaccurate and/or
mislabeled.
Data
Analysis/
Calculations
All calculations are
shown and the
results are correct
and labeled
(numbers, units,
and substances)
appropriately.
Submission
 Submit to Turnitin.com
Turnitin Information
Chemistry 1-Honors Period 1
Chemistry 1-Honors Period 3
Chemistry 1-Honors Period 5
Class ID
5668941
5668960
5668963
Enrollment password
c1hp1
c1hp3
c1hp5
Score