Error:
K2CrO4 %2B H2SO4 %3D K2Cr2O7 %2B K2SO4 %2B H2O
^
Unexpected character ('%')K2CrO4 %2B H2SO4 %3D K2Cr2O7 %2B K2SO4 %2B H2O
^
Unexpected character ('%')