
\documentclass{article}
\usepackage{chemformula}

\begin{document}

Aaa bbb ccc ddd eee fff ggg hhh iii jjj. Aaa bbb ccc ddd eee fff ggg hhh iii
jjj. Aaa \ch{2 NaCl + 2 H2O -> 2 NaOH + H2 + 2 Cl2} bbb ccc ddd eee fff ggg hhh
iii jjj.

Aaa bbb ccc ddd eee fff ggg hhh iii jjj. Aaa bbb ccc ddd eee fff ggg hhh iii
jjj.

\end{document}
