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结合2017年泉州市高三理综质量检查及复习教学过程中金属阳离子与碳酸氢根反应的疑难问题,通过理论推演,证明反应产物应为相应碳酸盐,而非因双水解而生成相应的氢氧化物,提出相应的教学指导解决方案。问题的提出(1)2017年泉州市高中毕业班第二次质量检查理科综合能力测试第28题:“(6)为防止生成Co(OH)2沉淀,可用NH4HCO3代替Na2CO3,写出反应的离子方程式。”
Combined with 2017 Quanzhou Gao Sanli comprehensive quality inspection and review of the teaching process of metal cation and bicarbonate reaction problems, through theoretical deduction, the reaction product should be the corresponding carbonate, rather than due to the two hydrolysis and generate the corresponding hydrogen Oxide, put forward the corresponding teaching guidance solution. Question (1) 2017 Quanzhou high school graduation class second quality inspection science comprehensive ability test Question 28: “(6) In order to prevent the formation of Co (OH) 2 precipitation, NH4HCO3 can be used instead of Na2CO3, write reaction Ion equation. ”