diff --git "a/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.pdf" "b/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.pdf"
index 5dc5cf9..483c8a8 100644
Binary files "a/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.pdf" and "b/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.pdf" differ
diff --git "a/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.tex" "b/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.tex"
index 9e68ace..cb6f03a 100755
--- "a/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.tex"
+++ "b/\347\204\241\346\251\237\345\214\226\345\255\246/inorganic-chemistry.tex"
@@ -35,8 +35,8 @@
   \end{tikzpicture}%
 }
 \newcounter{answer}
-%\newcommand{\hl}[1]{\answer{\textcolor{red}{#1}}}\newcommand{\hce}[1]{\textcolor{blue}{\ce{#1}}}\newcommand{\hlbox}[1]{\fbox{\textcolor{red}{\gtfamily #1}}}
-\newcommand{\hl}[1]{\answer{\qquad}}\newcommand{\hce}[1]{\fbox{\textcolor{white}{\ce{#1}}}}\newcommand{\hlbox}[1]{\fbox{\phantom{#1}}}
+\newcommand{\hl}[1]{\answer{\textcolor{red}{#1}}}\newcommand{\hce}[1]{\textcolor{blue}{\ce{#1}}}\newcommand{\hlbox}[1]{\fbox{\textcolor{red}{\gtfamily #1}}}
+%\newcommand{\hl}[1]{\answer{\phantom{あいう}}}\newcommand{\hce}[1]{\fbox{\textcolor{white}{\ce{#1}}}}\newcommand{\hlbox}[1]{\fbox{\phantom{#1}}}
 
 \pagestyle{empty}
 
@@ -455,8 +455,8 @@
    \ce{CS2}$\cdots$無色・芳香性・揮発性$\Rightarrow$\hl{無極性}触媒
    \subsubsection{反応}
    \begin{itemize}
-    \item 高温で多くの金属（\ce{Au}、\ce{Pt}を除く）との反応\\
-    \hce{Fe + S -> FeS}
+    \item 高温で多くの金属（\ce{Au}, \ce{Pt}を除く）と反応\\
+    \R \ce{Fe} \hce{Fe + S -> FeS}
     \item 空気中で\hl{青}色の炎を上げて燃焼\\
     \hce{S + O2 -> SO2}
    \end{itemize}