S #
% of DMSO
Pameters in mixed solvent system
K
sp
x10
6
(M
3
)
∆G (Kj/mole)
∆ H (Kj/mole)
∆S (J/mole)
1
0
9.19±0.3
26.79±0.06
-20.8±0.21
-171±1.8
2
10
3.47±0.20
39.92±0.21
-22.37±0.12
-185.2±4.3
3
20
0.944±0.18
40.57±0.321
-20.19±1.21
-188±0.21
4
30
0.108±0.039
41.21±0.56
-71.37±0.32
-159±0.65
5
40
0.0396±0.0006
40.80±0.45
-26.38±0.01
-233±3.21
6
50
0.000702±0.00022
52.17±0.621
-15.76±0.21
-232±3.21
Table 3:
Effect of mixed solvent system (water+ DMSO) on the K
sp
and thermodynamic parameters Ca(OH)
2
at 5±1°C.
