<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p><font face="serif">Let's make sure that we get this right. It
will really help if you look at the first page of the lab
procedures when going through this.<br>
<br>
<br>
For each of the <img alt="\documentclass{article}
\usepackage[utf8x]{inputenc}
\usepackage[version=3]{mhchem} \pagestyle{empty}
\begin{document}
\ce{B_4O_5(OH)4$^{2-}} \end{document}"
title="\documentclass{article} \usepackage[utf8x]{inputenc}
\usepackage[version=3]{mhchem} \pagestyle{empty}
\begin{document}
\ce{B_4O_5(OH)4$^{2-}} \end{document}" style="vertical-align:
middle;" src="cid:part1.89F882AC.E385BAD9@mercer.edu"> you
need to use 2 H+. So the concentration of the <img
alt="\documentclass{article}
\usepackage[utf8x]{inputenc} \usepackage[version=3]{mhchem}
\pagestyle{empty} \begin{document} \ce{B_4O_5(OH)4$^{2-}}
\end{document} " title="\documentclass{article}
\usepackage[utf8x]{inputenc} \usepackage[version=3]{mhchem}
\pagestyle{empty} \begin{document} \ce{B_4O_5(OH)4$^{2-}}
\end{document} " style="vertical-align: middle;"
src="cid:part2.3EF60240.885598FF@mercer.edu"> is going to be
1/2 the moles of acid used in the titration divided by the
original volume you collected in the test tube (5 ml)<br>
<br>
Now, the <img alt="$K_{\mathrm{sp}}$" style="vertical-align:
middle;" src="cid:part3.6CFA2F1B.5091834F@mercer.edu">
expression is<br>
</font></p>
<p><font face="serif"><img alt="$K_{\mathrm{sp}}=\mathrm{[Na^+]^2
[B_4O_5(OH)_4^{2-}]}=(2x)^2 x$" style="vertical-align:
middle;" src="cid:part4.C2E28F45.5EEEF3A6@mercer.edu"><br>
</font></p>
<p><font face="serif"> <br>
<br>
The concentration of the <img alt="\documentclass{article}
\usepackage[utf8x]{inputenc} \usepackage[version=3]{mhchem}
\pagestyle{empty} \begin{document} \ce{B_4O_5(OH)4$^{2-}}
\end{document}" title="\documentclass{article}
\usepackage[utf8x]{inputenc} \usepackage[version=3]{mhchem}
\pagestyle{empty} \begin{document} \ce{B_4O_5(OH)4$^{2-}}
\end{document}" style="vertical-align: middle;"
src="cid:part5.024A139C.FE6D1EDA@mercer.edu"> is going to be "<img
alt="$x$" style="vertical-align: middle;"
src="cid:part6.71140434.69BBA452@mercer.edu">" and the
concentration of the Na+ is going to be <img alt="$2x$"
style="vertical-align: middle;"
src="cid:part7.87BF9364.EF42CB58@mercer.edu">, <br>
and the value of <img alt="$K_{\mathrm{sp}}$"
style="vertical-align: middle;"
src="cid:part3.6CFA2F1B.5091834F@mercer.edu"> is going to be <img
alt="$4x^3$" style="vertical-align: middle;"
src="cid:part9.5DF9E01A.2F9CBAB5@mercer.edu">.<br>
<br>
Got it?<br>
<br>
<br>
When you prepare your plot of lnK vs 1/T, be sure to use KELVIN
for the temperature. </font>Use 8.314 for R (with its correct
units) when calculating the enthalpy and entropy for the reaction.</p>
<p><br>
</p>
<p>This lab report need a cover page, the completed report form, and
the graph ONLY. There is no need to turn in lab notebook pages
for this lab.</p>
<p><br>
</p>
<p>This should be turned in when you come to CLASS on Wednesday.<br>
</p>
<p><br>
</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
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
</pre>
</body>
</html>