Chyba:
Cr%28NO3%293 %2B KOH %2B Br2 %3D KBr %2B K2Cr2O7 %2B KNO3 %2B H2O
^
Neočakávaný ('%')Cr%28NO3%293 %2B KOH %2B Br2 %3D KBr %2B K2Cr2O7 %2B KNO3 %2B H2O
^
Neočakávaný ('%')