关于Mg（hco3）2+NAOH的反应,各种情况1、请不要直接转载别人的答案我需要清晰点的解说2、根据别处的问题可知分过量和足量的情况.如果足量反应时,生成Mg（OH）2和NA2CO3和H2O和CO2?为什么不是MG

关于Mg（hco3）2+NAOH的反应,各种情况1、请不要直接转载别人的答案我需要清晰点的解说2、根据别处的问题可知分过量和足量的情况.如果足量反应时,生成Mg（OH）2和NA2CO3和H2O和CO2?为什么不是MG
关于Mg（hco3）2+NAOH的反应,各种情况
1、请不要直接转载别人的答案我需要清晰点的解说
2、根据别处的问题可知分过量和足量的情况.如果足量反应时,生成Mg（OH）2和NA2CO3和H2O和CO2?为什么不是MGCO3和H2O?MGCO3不是更稳定吗?
3、根据2问,请告诉我判断离子反映各种条件的优先程度,就是说.是溶解度优先还是稳定性优先..之类的.最好能有通法.谢谢.答案好的可以再加分!

关于Mg（hco3）2+NAOH的反应,各种情况1、请不要直接转载别人的答案我需要清晰点的解说2、根据别处的问题可知分过量和足量的情况.如果足量反应时,生成Mg（OH）2和NA2CO3和H2O和CO2?为什么不是MG
MgCO3 和 Mg(OH)2 在常温下都是稳定的.（高温下都会分解）
但是,Mg(OH)2比MgCO3更难溶（Mg(OH)2是难溶,MgCO3是微溶）.所以根据反应原理,反应后离子浓度要降到最低,必须要生成Mg(OH)2而不是MgCO3.
或者这样想,如果生成了MgCO3,MgCO3也会水解生成更难溶的Mg(OH)2,最后沉淀转化得到的全部都是Mg(OH)2.
反应条件的优先程度是稳定性优先.一种物质即使溶解度再大,如果它不稳定,就会转化为其他物质.
前面的Mg(OH)2和MgCO3在常温下都是稳定的,所以只需考虑溶解度就行了.因为Mg(OH)2更难溶,所以生成的是Mg(OH)2

这一类与量有关的反应，一般地是依次地发生两个反应，理论认为，前一个反应完成以后，才开始第二个反应，所以反应物比例不同会出现不同的化学方程式。至于通法，却是没有，随反应类型的不同而异。下面解释2：由于氢氧化镁的溶解度小于碳酸镁，氢氧根离子与碳酸氢根离子的反应顺序在后，也就是说，当氢氧化钠不足时，先生成氢氧化镁，而不生成碳酸根离子，也就不生成碳酸镁【生成沉淀时，优先生成溶解度小的物质，参见ksp知识。...

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这一类与量有关的反应，一般地是依次地发生两个反应，理论认为，前一个反应完成以后，才开始第二个反应，所以反应物比例不同会出现不同的化学方程式。至于通法，却是没有，随反应类型的不同而异。下面解释2：由于氢氧化镁的溶解度小于碳酸镁，氢氧根离子与碳酸氢根离子的反应顺序在后，也就是说，当氢氧化钠不足时，先生成氢氧化镁，而不生成碳酸根离子，也就不生成碳酸镁【生成沉淀时，优先生成溶解度小的物质，参见ksp知识。】。
关于碳酸氢盐与氢氧化钠反应时，规律是：如果氢氧根离子能够与阳离子反应【生成NH3·H2O或者氢氧化物沉淀时】，就先与阳离子反应；如果不能与阳离子反应【生不成沉淀，氨水时。】，就先与碳酸氢根离子反应，生成碳酸根离子【可能还继续与阳离子生成碳酸盐沉淀】。

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