温度/℃
0
10
20
30
40
50
60
70
80
90
100
溶解度/g
31.2
33.5
36.4
40.4
45.7
52.2
59.2
66.2
73.1
86.8
89.0
a . NaOH溶液
b.Na2CO3溶液
c.K2CO3溶液