41、录回本章目录O返回返回回主目录回主目录KMnO4标液的标定标液的标定基准物质基准物质Na2C2O4、 FeSO4 (NH4)2SO46H2O、 As2O3 等等2MnO4- + 5C2O42- +16H+ = 2Mn2+ +10CO2 + 8H2O标定条件:标定条件:温度:温度:7085酸度:酸度:0.51molL-1 H2SO4介质介质滴定速度:开始滴定要慢滴定速度:开始滴定要...
The formulae for these reactions are: MnO2 + 2FeSO4 + 3H2SO4 → MnSO4 + Fe2(SO4)3 + 2H2O, (1) Fe + Fe2(SO4)3 → 3FeSO4, (2) Fe + H2SO4 → FeSO4 + H2, (3) Zn + H2SO4 → ZnSO4 + H2. (4) When the dry battery is dissolved in steel acid cleaning waste solution, ...
the Fe3O4-35nm sample, two solutions were prepared: a basic solution consisting on a mixture of 25 mL NaNO3 (2 M) and NaOH (4.2 M), 88 mL of distilled water and 62.5 mL of ethanol, and an acid solution formed by 13.9 g of FeSO4·7H2O dissolved in 50 mL of H2SO4 (0.01 M)...
以三种形式存在：有机硫：与碳氢化合物结合在一起硫化物中硫：主要存在于FeS2硫酸盐中硫：存在于各种硫酸盐中（CaSO4,FeSO4)硫为有害物质:S+O2=SO2 、SO2+O2=SO3 SO2+H2O=H2SO3、SO3+H2O=H2SO4 A：煤燃烧后的产物，为有害物质，降低煤的发热量，造 成不完全燃烧损失。主要产物为：SiO2、AlO3、FeO...