Fehler:
H3AsO3 %2B Zn %2B HCl %3D ZnCl2 %2B AsH3 %2B H2O
^
Unerwartets Zeichen ('%')H3AsO3 %2B Zn %2B HCl %3D ZnCl2 %2B AsH3 %2B H2O
^
Unerwartets Zeichen ('%')