已知:不同温度下,NH4Fe(SO4)2和NH4Al(SO4)2的溶解度(g/100gH2O)如表:
温度/℃
0
20
30
40
100
NH4Fe(SO4)2
70.6
75.4
78.3
81.0
102.1
NH4Al(SO4)2
2.1
5.0
7.7
10.9
26.7