Table 2
Cr(III) precipitation with Na2CO3 0.1M at different molar ratios.
Initial Cr(III) solution (mol) Na2CO3 (0.1M) (mL) Molar ratio Cr3+:CO3
2− Cr(OH)3 (mol) Cr(OH)3(H2O)3 (mol)
9.58×10−5 1.5 1.00:1.56 1.23×10−4 8.09×10−5
2.0 1.00:2.08 1.33×10−4 8.73×10−5
2.5 1.00:2.61 1.24×10−4 8.15×10−5
9.62×10−5 1.5 1.00:1.56 1.14×10−4 7.77×10−5
2.0 1.00:2.08 1.45×10−4 9.49×10−5
2.5 1.00:2.61 1.34×10−4 8.71×10−5