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<div class="moz-cite-prefix">On 9/19/20 1:57 PM, wrote:<br>
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Good afternoon Professor Pounds,</div>
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I am finishing up my lab report and I keep getting confused on
how to calculate and find the mass of alum both theoretical and
actual. Thank you for your help and I hope you have a great
day!</div>
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<p>So we discussed in class how, after going through all four of the
reaction equations, the stoichiometric relationship between
aluminum and alum is 1 to 1 -- for each mole of aluminum you
should produce a mole of alum.</p>
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<p>To calculate the theoretical yield of alum you should then take
the mass of aluminium that you initially massed, divide that
number by the molar mass of aluminium and then multiply by the
molar mass of the alum.</p>
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<p>To compute the percent yield take the actual mass of alum that
you had at the end, divide by the theoretical yield, and multiply
that result by 100.</p>
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<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Director of the Computational Science Program
Mercer University, Macon, GA 31207 (478) 301-5627
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