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离子方程式是重要的化学用语,是重点和难点知识。判断离子方程式正误题年年出现在高考化学试卷中,成为高考的固定常规题。国家教委考试中心公布的统计数字表明,此类试题具有难度适中,区分度较好的特点。下面以近年的高考题为例,分析总结解此类题需掌握的基础知识,并简述解题的思路及规律。 [例1](1994年高考题)下列离子方程式中不正确的是( ) (A)碳酸氢钙溶液跟盐酸反应:
The ion equation is an important chemical term and it is important and difficult knowledge. Judging the correctness of the ion equations appears annually in the college entrance examination chemistry test paper and becomes a regular question for the college entrance examination. According to statistics released by the National Education Commission Examination Center, such questions are of moderate difficulty and good distinction. Take the recent college entrance examination questions as an example, analyze and summarize the basic knowledge needed to solve such problems, and briefly describe the ideas and laws of solving problems. [Example 1] (College entrance question in 1994) The following ion equation is incorrect () (A) Reaction of calcium bicarbonate solution with hydrochloric acid: