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Table 3

Calculated initial and complete precipitation pHs

ItemCu(OH)2 (initial Cu2+ = 1.33 × 10−3mol/L)Zn(OH)2 (initial Zn2+ = 3.85 × 10−3mol/L)Al(OH)3 (initial Al3+ = 0.08 mol/L)Fe(OH)3 (initial Fe3+ = 0.15 mol/L)
 2.2 × 10−20 1.2 × 10−17 1.3 × 10−33 4.0 × 10−38 
Initial precipitation pH 4.39 6.75 3.40 1.81 
Complete precipitation pH 7.0 8.66 4.70 3.20 
ItemCu(OH)2 (initial Cu2+ = 1.33 × 10−3mol/L)Zn(OH)2 (initial Zn2+ = 3.85 × 10−3mol/L)Al(OH)3 (initial Al3+ = 0.08 mol/L)Fe(OH)3 (initial Fe3+ = 0.15 mol/L)
 2.2 × 10−20 1.2 × 10−17 1.3 × 10−33 4.0 × 10−38 
Initial precipitation pH 4.39 6.75 3.40 1.81 
Complete precipitation pH 7.0 8.66 4.70 3.20 
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