DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL
DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL
DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL
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Useful Graphs, Tables, and Other Information<br />
Table 42. Concentration and density of Na2CO3 solutions.<br />
g Na2CO3/100 g<br />
Solution ————— Concentration ————— ——— Density ———<br />
Weight % g Na2CO3/L eq/L lb/gal kg/L ° Baumé<br />
1 10.1 0.191 0.084 1.009 1.4<br />
2 20.4 0.385 0.17 1.019 2.8<br />
3 30.9 0.583 0.26 1.029 4.3<br />
4 41.6 0.785 0.35 1.040 5.6<br />
5 52.5 0.991 0.44 1.050 7.0<br />
6 63.6 1.20 0.53 1.061 8.4<br />
7 75.0 1.42 0.63 1.071 9.8<br />
8 85 1.63 0.72 1.082 11.0<br />
9 98.3 1.85 0.82 1.092 12.4<br />
10 110.3 2.08 0.92 1.103 13.6<br />
12 134.9 2.55 1.13 1.124 10<br />
14 160.5 3.03 1.34 1.146 18.4<br />
16 187.0 3.53 1.53 1.169 21.0<br />
18 214.7 4.05 1.70 1.193 23.4<br />
12.9 Solubility of CaSO4<br />
CaSO4 is only very slightly soluble in water and dilute H2SO4. CaSO4 precipitation should be prevented in<br />
an ion exchange bed, where it may occur when H2SO4 is used to regenerate a cation exchange resin.<br />
Precipitation can be avoided by step-wise regeneration as discussed in Section 11.6.<br />
Figure 29. Solubility of CaSO4 in solutions of H2SO4 in water.<br />
<strong>DOWEX</strong> <strong>Ion</strong> <strong>Exchange</strong> <strong>Resins</strong> 85 Water Conditioning Manual
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