1 files changed, 15 insertions, 24 deletions
diff --git a/cer/flame/flame0.tex b/cer/flame/flame0.tex
index 73c6bfc..b117c71 100644
--- a/cer/flame/flame0.tex
+++ b/cer/flame/flame0.tex
@@ -7,32 +7,23 @@
 \question{How can you use flame color to identify the metal ion in an unknown compound?}
 \claim{If an unknown metal ion's flame color matches that of a known metal ion, then the metal ion likely is the same because metal ions produce characteristic colors when burned.}
 
-\def\data{
-  \let\rr=\cr
-  \def\width{1.65in}
-  \def\text##1{\ \tiny \tolerance=10000 \hbadness=10000 \hbox to \width{\vbox{\vskip1ex \noindent \hsize\width ##1 \smallskip}} }
-  \halign{\vrule width 1pt \text{##} & \vrule \text{##} \vrule width 1pt \cr
-  \noalign{\hrule height 1pt}
-  \head Ionic Compound in Solution & Observed Flame Color \cr
-  \noalign{\hrule}
-  $HCl$ Solution (baseline) & blue \cr \noalign{\hrule height 0.05pt}
-  0.5M calcium chloride ($CaCl_2$) & orange-red \cr \noalign{\hrule height 0.05pt}
-  0.5M sodium chloride ($NaCl$) & orange-yellow \cr \noalign{\hrule height 0.05pt}
-  0.5M barium chloride ($BaCl_2$) & pale green \cr \noalign{\hrule height 0.05pt}
-  0.5M lithium chloride ($LiCl$) & red \cr \noalign{\hrule height 0.05pt}
-  0.5M copper(II) chloride ($CuCl_2$) & blue-green \cr \noalign{\hrule height 0.05pt}
-  0.5M cesium chloride ($CsCl$) & blue-violet \cr \noalign{\hrule height 0.05pt}
-  Unknown Solution \#1 & red \cr \noalign{\hrule height 0.05pt}
-  Unknown Solution \#2 & blue-violet \cr \noalign{\hrule height 0.05pt}
-  \noalign{\hrule height 1pt}
-  }
+\data{\vrule width 1pt \text{##} & \vrule \text{##} \vrule width 1pt \cr}{1.65in}{
+  \head Ionic Compound in Solution & \head Observed Flame Color \cr \noalign{\hrule}
+  $HCl$ Solution (baseline) & blue \endlinex
+  0.5M calcium chloride ($CaCl_2$) & orange-red \endlinex
+  0.5M sodium chloride ($NaCl$) & orange-yellow \endlinex
+  0.5M barium chloride ($BaCl_2$) & pale green \endlinex
+  0.5M lithium chloride ($LiCl$) & red \endlinex
+  0.5M copper(II) chloride ($CuCl_2$) & blue-green \endlinex
+  0.5M cesium chloride ($CsCl$) & blue-violet \endlinex
+  Unknown Solution \#1 & red \endlinex
+  Unknown Solution \#2 & blue-violet \endlinex
 }
-\def\makedata{\data}
 
-\evidence{%\parsub \noindent\data\parsub\smallskip
-\qquad\qquad\qquad\qquad Lab Results\parsub
-\qquad Metal ion in Unknown Solution \#1: Lithium \parsub 
-\qquad Metal ion in Unknown Solution \#2: Cesium \parsub
+\evidence{
+\centerline{Lab Results}
+\centerline{Metal ion in Unknown Solution \#1: Lithium}
+\centerline{Metal ion in Unknown Solution \#2: Cesium}
 I know that the claim is true because all studied metal-chloride salts have different colors. The $LiCl$ salt, for example, burns a characteristic red which is backed up by an identical chemical solution burning the same color. All other examples on the above list have unique colors, and all samples of the same ions produce the same colors (as can be logically expected). The other example of the last property allowing identification of a given metal ion is $CsCl$, the second unknown solution which is blue-violet in both cases. This also gives a good clue as to the investigative question: one can determine the given metal ion of an unknown substance by cross-checking its flame test with the flame test of known substances.
 }