(5)取甲烧杯中的少量Fe(OH)3胶体于试管中,向试管中逐滴滴加稀盐酸,现象为先观察到沉淀,后沉淀溶解,原因为加入的盐酸是电解质,所以先使Fe(OH)3胶体聚沉,后发生酸碱中和反应,沉淀溶解,反应的方程式为Fe(OH)3+3HCl=FeCl3+3H2O,故答案为:先观察到沉淀,后沉淀溶解;加入的盐酸是电解质,所以先使Fe(OH)3胶...
故答案为:烧杯中溶液变为红褐色;FeCl3+3H2O △ . Fe(OH)3(胶体)+3HCl;因为胶体粒子通过吸附离子而带相同电荷,胶体粒子间相互排斥使它们不易聚沉..sf-sub-indicator{top:.8em;background-position:-998px -100px}a:active>.sf-sub-indicator,a:focus>.sf-sub-indicator,a:hover>.sf-sub-indicator,li....
6. Geological characteristics of other Makeng-type Fe polymetallic deposits, comprising the Makeng Fe–Mo, Luoyang Fe–Mo, Pantian Fe, and Yangshan Fe polymetallic deposits and the Cuntou and Dongbaoshan Fe polymetallic occurrences near Makeng, are summarized in Supplementary Data 1. 4. ...
Accadueo - H2O est l'événement de référence pour les services d'eau italiens et internationaux.marL'objectif de cette nouvelle nomination est double : d'une part, favoriser le lien entre les entreprises... TradeshowEnvironnement & Déchets Suivre1 ...
Contents(Fe2O3·H2O) % ≥ 90 86 88 96 Oil Absorption ml/100g 15-25 25-35 25-35 15-25 Water soluble salts% ≤ 0.5 0.3 0.3 0.3 Res. on 325 mesh % ≤ 0.5 0.3 0.5 0.3 Moisture % ≤ 1.5 1.0 1.5 1.0 PH Value 5-8 33-7 4-7 3.5-7 Ignition lo...
Contents(Fe2O3·H2O) % ≥ 90 86 88 96 Oil Absorption ml/100g 15-25 25-35 25-35 15-25 Water soluble salts% ≤ 0.5 0.3 0.3 0.3 Res. on 325 mesh % ≤ 0.5 0.3 0.5 0.3 Moisture % ≤ 1.5 1.0 1.5 1.0 PH Value 5-8 33-7 4-7 3.5-7 Ignition loss (1,...
CuSO4+K3Fe(CN)6→FeSO4+K3Cu(CN)6 What is the color of : 1.K3Fe(CN)6?2.K3Cu(CN)6? Chemical reaction Chemical reactions are generally characterized by the occurrence of the physical as well as chemical changes. Inorganic chemical changes, organic ...
25℃电极的反应为O2+ 2H++ 2e-=H2O2,其标准电极电势为0.68V,而EƟ(OH-,H2O/O2) = 0.401V,则电极反应为H2O2+ 2H++ 2e-=2H2O的电极,在25℃时的标准电极电势EƟ为( ) A. 0.2576 V B. 0.279 V C. 1.081 V D. 1.778 V 查看完整题目与答案 全面期间下列提示麻醉过浅...
Zn(NO3)2•6H2O (1666 mg, 5.56 mmol) and Fe(acac)3 (99.60 mg, 0.28 mmol) were dissolved in 40 mL methanol to form solution B. Then, solution A and solution B were mixed. After sonification for 20 min, 2-methylimidazole (2-MI, 3700 mg, 45.07 mmol) was...
Abstract:The problem of wastewater treatment has always been around us,and the treatment of dye wastewater is particularly troublesome.Dye wastewater has high acidity,heavy color,which is difficult to degrade.However,with the development of science and technology,more and more technologies have been ...