Abstract: | Investigations in the System Al3+? WO42?? H2O? H3O+ The composition of the tungstoaluminate anion AlW12O40]5? was determined by means of the molar ratio and JOB 's method of continuous variations modified by us. The optimum conditions for the complex formation in the system Al3+? WO42?? H2O? H3O+ were determined: 1.33 ≤ acid degree Z ≤ 2.5; 105°C; 2–6h (c = 7.15 · 10?2–6 · 10?3 moles · l?1). The complex formation in dependence on the acid degree Z is complete at Z = 16 H3O+/12 WO42? = 1.33. |