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<p>I have had this question come up a few times, so let me provide
an example. <br>
</p>
<p>Let's say you weighed 3.9845 g of the nickel sulfate hexadrate.
To find the molarity of the first solution you find the moles of
nickel
sulfate hexahydrate and then dilute it to 100 ml in the volumetric
flask. <br>
</p>
<p><img alt="$M = \frac{\frac{3.9845}{262.9}}{0.100 L} = 0.1516\ M$"
style="vertical-align: middle;"
src="cid:part1.52D6A563.93522C44@mercer.edu"> <br>
</p>
<p>To make the second solution, you use 20 ml of this standard
solution and
dilute it in a 50 ml volumetric flask. In this case, use the
<img alt="$M_1V_1=M_2V_2$" style="vertical-align: middle;"
src="cid:part2.129B96B2.572B368F@mercer.edu"> equation in a
rearranged format. <br>
</p>
<p><img alt="$M_2 = \frac{M_1V_1}{V_2} = \frac{(0.1516 M)(0.02000
L)}{(0.05000 L)} =
0.06064 M$" style="vertical-align: middle;"
src="cid:part3.48FC3919.1CA5E5D5@mercer.edu"> <br>
</p>
<p>You then use the same process, i.e. <img alt="$M_1V_1=M_2V_2$"
style="vertical-align: middle;"
src="cid:part2.129B96B2.572B368F@mercer.edu">, with varying
volumes to compute the molarities of solutions 3, 4, and 5. Be
sure and
use the correct molarity of the initial solution when you do the
calculation for the fifth solution.</p>
<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
</pre>
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