磷石膏是湿法生产磷酸排出的工业废渣,主要成分是CaSO4·2H2O。 ⑴CaSO4·2H2O脱水反应相关的热化学方程式为: CaSO4·2H2O(s)=CaSO4·H2O(s)+H2O(g) ΔH1=83.2 kJ·mol-1 CaSO4&
The thermal decomposition of polyhalite (K2SO4 · MgSO4 · 2 CaSO4 · 2H2O) was investigated by DSC/TG and X-ray powder diffraction. The decomposition of the polyhalite starts at 285 掳C in releasing the crystal water within one step. Simultaneously the decomposition of the polyhalite into ...
感难元称家团改出力还听太建筑石膏的分子式是()感难元称家团改出力还听太 A. CaSO4middot;2H2O B. CaSO4 C. CaS4middot;H2O D
The aqueous phase was a 0.0167 mol·dm−3 saturated solution of gypsum (669 mg·dm−3 calcium) at pH 7.2, which corresponds well to the solubility limit of CaSO4·2H2O [42]. This solution was used for further experiments. Next, a 100 mL sample of this stock solution was mixed with...