非金属氧化物+碱会是什么? 碱能跟所有的非金属氧化物反应对吗？
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（1）非金属氧化物属于酸性氧化物的非金属氧化物 + 碱 = 盐+水（2）SO2+2NaOH=Na2SO3 +H2O
CO2+2NaOH=Na2CO3 +H2O
SO3+2KOH= K2SO4 +H2O
P2O5 + 3Ca(OH)2 = Ca3(PO4)2 +3H2O
用NaOH和CO2做例子
CO2少量或适量：
2NaOH+CO2=Na2CO3+H2O
CO2过量的话：
Na2CO3+CO2+H2O=2NaHCO3
注意看清楚下标
盐+水
过量：强碱弱酸盐
非金属氧化物+碱=盐+水
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