众所周知,AlCl_3(或其它可溶性铝盐)溶液与NaOH溶液作用,生成的Al(OH)_3沉淀又可部分或全部溶于过量NaOH溶液。这一化学变化可用化学方程式表示为: It is known that AlCl 3 (or other soluble aluminum salt) solution reacts with NaOH solution, and the resulting Al(OH) 3 precipitate can be partially or completely dissolved in excess NaOH solution. This chemical change can be expressed as a chemical equation: