(6分)写出除杂反应方程式(括号内的物质为杂质)。 (1)FeSO4(CuSO4)________________________________________________ (2)CaO(CaCO3) _______________________________________________ (3)NaOH(Na2CO3)______________________________________________ (4)HNO3 (HCl) _______________________________________________ (5)KNO3(K2SO4) _______________________________________________ (6)NaCl(NH4Cl) _______________________________________________ |