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已知金属铝的熔点比金属镁高,则镁铝合金的熔点(  )



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Ͻ(Ͻܸ)Ͻпܳ۵...Ͻ۵͡ һºϽ۵...Ӳ(ͭþ)۵Ϊ 641;þ ۵...
һþϽѧʽΪMg17Al12,д,...
һþϽѧʽΪMg17Al12,д,úϽһȫ...AϽ۵þ۵֮ BúϽþԪسʸ,Ԫس...
2017߿ѧһָϰ:()ר3.3+þ...
Ͻ۵þ۵ 3. ϳһ 2016 ¿ַƱ: () ֪õϡ NaOH ҺΪ 3mol/L. ͼ...
þϰ
˵ȷ A.Ͻ۵þ۵֮ B.úϽþԪسʸ,Ԫس C.1mol Mg17Al12 ȫõĻ Y ...
...ټ:3.4 ;㷺 ...
йþϽʵ,ȷ( A.Ͻ۵þ۵...MgO ۵Ӧõڵ MgCl2 ķȡ;ǻý,...
ڶµڶ仯
й˵ȷ( ) A.þϽ۵þ۵֮ ... 2й Al(OH)3 ͼ - 4.֪,Al(OH)3 ...
þϽ
1.1 þϽ þϽڹӦĽṹϡþܶΪ 1.74g/cm3, 1/4, 2/3۵ 650,۵...
þϽԱ
ȻþϽϵϽ,,ϸ߳...(g/cm3 1.82 ۵ () 596 ϵ (W/Mk...þϽ۵Ͻ۵,ѹܺáþϽ...
...:ʱҵ() 3.4;㷺 ...
˵ȷ ( A.Ͻ۵þ۵֮ B.úϽ...(5: Fe(OH)3 Fe(OH)2 Cu(OH)2 ʼʱ pH 1.9 7....
...߿ѧרͬѵ:;㷺...
NH4CuSO3 10 2+ A.Ͻ۵þ۵֮ B....(5: Fe(OH)3 Fe(OH)2 Cu(OH)2 ʼʱ pH 1.9 7....
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