<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
In the BAR report you need to calculate ln[Allura Red]. The sig.
fig. for <br>
log(x) and ln(x) are tricky. It's explained in a help file I have
specifically<br>
about logs and s.f. at my "Helpful Tidbit" link. Sig. fig. for
logarithms is<br>
also explained in Appendix A of the textbook. This is also very
important<br>
for ch 16 and 17 since you have to take base ten logs to get pH,
pOH, etc.<br>
<br>
<a
href="https://www.asc.ohio-state.edu/zellmer.1/chem1220/faq/sig_fig_logs.txt"
moz-do-not-send="true"><b>Manipulating Logs and Sig. Figs.</b></a><br>
<br>
Dr. Zellmer
</body>
</html>