Chyba:
K2SO4 %2B CuSO4 %2B H2O %3D K2Cu%28SO4%292%2A6H2O
^
Neočakávaný ('%')K2SO4 %2B CuSO4 %2B H2O %3D K2Cu%28SO4%292%2A6H2O
^
Neočakávaný ('%')