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Journal of Chemistry
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2014
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Article
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Tab 2
/
Research Article
Dissolution and Solubility of the (
)HAsO
4
·H
2
O Solid Solution in Aqueous Solution at 25°C and pH 2
Table 2
Analytical data and solubility determination of the (
)HAsO
4
·H
2
O solid solution.
Sample
Dissolution time (h)
pH
Concentration (mmol/L)
Average
(kJ/mol)
Ba
Sr
As
SrHAsO
4
·H
2
O
2880
7.96
0.00
9.08
12.88
−4.62
−4.62
−1537.94
3600
7.90
0.00
9.12
12.83
−4.62
4320
7.95
0.00
9.16
12.53
−4.62
(Ba
0.21
Sr
0.79
)HAsO
4
·H
2
O
2880
7.77
0.91
13.34
15.38
−4.70
−4.69
−1538.54
3600
7.77
0.98
13.32
15.54
−4.69
4320
7.74
0.94
13.32
15.53
−4.69
(Ba
0.42
Sr
0.58
)HAsO
4
·H
2
O
2880
6.86
1.63
8.73
11.68
−5.11
−5.13
−1541.25
3600
6.85
1.56
8.82
11.07
−5.13
4320
6.83
1.54
8.69
10.81
−5.15
(Ba
0.61
Sr
0.39
)HAsO
4
·H
2
O
2880
6.18
3.92
5.18
10.15
−5.45
−5.49
−1543.50
3600
6.10
3.91
5.17
10.17
−5.51
4320
6.06
3.93
5.20
10.24
−5.53
(Ba
0.82
Sr
0.18
)HAsO
4
·H
2
O
2880
5.72
9.45
1.55
11.58
−5.57
−5.61
−1544.24
3600
5.67
9.51
1.56
11.16
−5.63
4320
5.68
9.57
1.57
11.07
−5.62
BaHAsO
4
·H
2
O
2880
5.61
10.53
0.00
11.42
−5.49
−5.52
−1543.99
3600
5.56
10.56
0.00
11.25
−5.53
4320
5.57
10.69
0.00
10.94
−5.53