2022年9月30日 · My chemistry teacher said that pure Fe(OH)X2 F e (O H) X 2 is a "white" crystalline solid in anaerobic environments, and acquires the usual green tinge, the colour of Fe(II) F e (I I), when in contact with air. Wikipedia also agrees with this:

Iron (II) hydroxide or ferrous hydroxide is an inorganic compound with the formula Fe (OH) 2. It is produced when iron (II) salts, from a compound such as iron (II) sulfate, are treated with hydroxide ions. Iron (II) hydroxide is a white solid, but even traces of oxygen impart a greenish tinge.

2024年9月15日 · Fe(OH)2与Fe(OH)3的颜色分别为白色和红褐色。 它们分别是亚铁离子和铁离子的氢氧化物。亚铁离子为+2价，铁离子为+3价。 Fe(OH)2转化为Fe(OH)3的条件是亚铁离子被氧化，而铁离子则可以被还原。 Fe(OH)2在空气中被氧气氧化时，首先会变成灰绿色，然后逐渐转变为 …

2024年5月7日 · Fe (OH)2：氢氧化铁的颜色为白色，它在水中溶解时呈现这个颜色。 Fe (OH)3：氢氧化铁 (III)的颜色为红褐色，这种沉淀物在水中形成时呈现这个颜色。 希望这些信息能够帮助您！ Fe,FeO,Fe2O3,Fe3O4,Fe (OH)2,Fe (OH)3分别是什么颜色?Fe：铁在常温下呈现银白色，如果是铁片则颜色更为明显，而铁粉末则呈现黑色。 FeO：氧化亚铁的颜色为黑色。 Fe2O3：氧化铁的颜色为红褐色，也被称为铁红。 Fe3O4：四.

2017年1月21日 · 硫酸亚铁FeSO4、氯化亚铁FeCl2、硝酸亚铁Fe(NO3)2水溶液呈淡绿色 可见，含铁的盐溶液的颜色，是由所含Fe2+或Fe3+的不同决定的． 扩展知识：

2024年5月27日 · Iron (II) hydroxide, also called ferrous hydroxide, is an inorganic chemical compound made up of an atom of iron in its second oxidation state (the two valence electrons of iron are linked to other ions, atoms, or molecules), and two hydroxide anions. Its chemical formula is written as Fe(OH) 2. Pure iron (II) hydroxide usually exists as a ...

查阅《高等无机化学》 ：α -Fe2O3 是绿色，β - Fe2O3 是 黄色。 而它们无论是和白色絮状物（Fe (OH)2 沉淀）混合或是和 红褐色沉淀物（Fe (OH)3 沉淀）混合都不会产生灰绿色。 所以由 此可以证明变体不会对该实验产生影响。 ⑥可以排除。 f通过查找资料，在老师的帮助下，我们又提出了三种假设： ⑦反应中，溶液中存在 Fe2 （浅绿色） ； ⑧难溶物变成配位化合物时，必须以离子的形式进行配位，例如：AgCl 溶于 氨水时，变成了 Ag (NH3)2Cl。

2019年10月6日 · Brief description of the Fe (II): The iron hydroxide (II) is an inorganic substance of white color. Sometimes has a greenish tint due to impurities salts of iron. Over time, the air darkens due to oxidation, getting dirty-brown color (color …

Ferrous hydroxide ( Fe (OH) 2 ) and ferric hydroxide ( Fe (OH) 3 ) are insoluble in water and form green colour and brown colour precipitates in water. These precipitates do not dissolve in excess aqueous NaOH. Chromium hydroxide is green precipitate which is formed when dilute NaOH is added to Cr +3 ion.

Iron (II) hydroxide is a chemical compound. Its chemical formula is Fe (OH) 2. It has iron and hydroxide ions in it. The iron is in its +2 oxidation state. When pure, it is a white solid. It very easily turns dark green in air, which is its normal form. It then reacts with more oxygen to turn brown as iron (III) oxide is formed.