抄録
The effect of firing temperature of Mg(OH)2 ranging 600°-1500°C on the solubility of MgO in acid solutions and the solubility of synthetic MgO⋅Fe2O3 in several solutions at 50°±0.5°C were studied. Mg+2 and Fe+3 ions in the solutions were determined by EDTA method. The results obtained are summarized as follows: the solubility of MgO depends on the firing temperature of Mg (OH)2, being a maximum at 800° and then decreasing with increasing the temperature up to 1500°C. In the system of synthetic MgO⋅Fe2O3 large amount of MgO is dissolved at the initial stage. It is seen that the iron radius, polarizing power of Mg+2, Fe+3 and bond strength between Mg+2, Fe+3 and O-2 affect the solubility of MgO⋅Fe2O3.
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