二、实验原理 NH2 SO3H+NaOH NH2 SO2Na+H2O NH2 -S0gN阳+H20 NaNO2 N在N c HCI S03H- C6H5N(CH3)2 -N-N NH(CH3)2 HAc Ac NaOH SONa N-N N(CH3)2+NaAc+H2O 二、实验原理 NH2 SO3 H + NaOH NH2 SO3 Na+ H2O NH2 SO3 Na+ H2O NaNO2 HCl SO3 H N + N Cl￾C6 H5 N(CH3 ) 2 HAc SO3 H N N NH(CH 3 ) 2 Ac NaOH SO3 Na N N N(CH3 ) 2+ NaAc+ H2O