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化学问题mgoh2是沉淀吗那为什么方程里mg+2h2o 加热得到mgoh2没有沉淀符号
化学问题mgoh2是沉淀吗那为什么方程里mg+2h2o 加热得到mgoh2没有沉淀符号
2025-04-08 00:19:01
推荐回答(1个)
回答1:
是沉淀。
Mg+2H2O=Mg(OH)2+H2
并非所有气体和沉淀都要标出箭头。
“左无气右有气,”标向上箭头。
“左液右固”,标向下箭头。
原则:无中生有
因为反应前镁是固体,反应后再生成固体不必标出。
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