Search results
Results from the WOW.Com Content Network
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
When this layer is corroded by acids such as hydrochloric acid and sulfuric acid, the reaction proceeds with the evolution of hydrogen gas. [1] [9] Zn + 2 H + → Zn 2+ + H 2. Zinc reacts with alkalis as with acids. With oxidants such as chalcogens and halogens, Zn forms binary compounds such as ZnS and ZnCl 2.
Fine ZnS powder is an efficient photocatalyst, which produces hydrogen gas from water upon illumination. Sulfur vacancies can be introduced in ZnS during its synthesis; this gradually turns the white-yellowish ZnS into a brown powder, and boosts the photocatalytic activity through enhanced light absorption. [1]
The oxide ZnO is a white powder that is nearly insoluble in neutral aqueous solutions, but is amphoteric, dissolving in both strong basic and acidic solutions. [50] The other chalcogenides (ZnS, ZnSe, and ZnTe) have varied applications in electronics and optics. [62] Pnictogenides (Zn 3 N 2, Zn 3 P 2, Zn 3 As 2 and Zn 3 Sb 2), [63] [64] the ...
Iron(II) sulfate – FeSO 4; Iron(III) chloride – FeCl 3; Iron(III) fluoride – FeF 3; Iron(III) oxalate – C 6 Fe 2 O 12; Iron(III) oxide – Fe 2 O 3; Iron(III) nitrate – Fe(NO 3) 3 (H 2 O) 9; Iron(III) sulfate – Fe 2 (SO 4) 3; Iron(III) thiocyanate – Fe(SCN) 3; Iron(II,III) oxide – Fe 3 O 4; Iron ferrocyanide – Fe 7 (CN) 18 ...
Mercury is the only metal that is known to be a liquid at room temperature – as copernicium's boiling point has not yet been measured accurately enough, [note 2] it is not yet known whether it is a liquid or a gas under standard conditions. While zinc is very important in the biochemistry of living organisms, cadmium and mercury are both ...
Zinc hydroxide Zn() 2 is an inorganic chemical compound.It also occurs naturally as 3 rare minerals: wülfingite (orthorhombic), ashoverite and sweetite (both tetragonal). Like the hydroxides of other metals, such as lead, aluminium, beryllium, tin and chromium, Zinc hydroxide (and Zinc oxide), is amphoteric.
The iron compounds produced on the largest scale in industry are iron(II) sulfate (FeSO 4 ·7H 2 O) and iron(III) chloride (FeCl 3). The former is one of the most readily available sources of iron(II), but is less stable to aerial oxidation than Mohr's salt ((NH 4) 2 Fe(SO 4) 2 ·6H 2 O). Iron(II) compounds tend to be oxidized to iron(III ...