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离子方程式的书写是重要的化学基本技能,是高考考查的重点。对于相同的反应物质,反应物的量不同往往发生的反应不同,造成产物不同。这类化学反应的离子方程式的书写是一个难点。
The writing of ion equations is an important chemical basic skill and is the focus of the college entrance examination. For the same reaction substance, the reaction of different reactants tends to have different reactions, resulting in different products. The writing of ion equations of this kind of chemical reaction is a difficult point.