Loading...
  • calcium oxide
  • For example, calcium carbonate (CaCO 3 ) produces carbon dioxide and calcium oxide (CaO). (britannica.com)
  • New York City's Brooklyn Bridge base is made from locally mined cement, a mixture of calcium oxide and magnesia cement commonly called Rosendale Natural Cement , the only natural non-fired cement made in the US. (wikipedia.org)
  • Calcium oxide is widely used in industry, e.g., in making porcelain and glass in purifying sugar in preparing bleaching powder , calcium carbide, and calcium cyanamide in water softeners and in mortars and cements. (infoplease.com)
  • Calcium oxide is a basic anhydride, reacting with water to form calcium hydroxide during the reaction (slaking) much heat is given off and the solid nearly doubles its volume. (infoplease.com)
  • Magnesium
  • Magnesium oxide ( Mg O ), or magnesia , is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide ). (wikipedia.org)
  • While "magnesium oxide" normally refers to MgO, magnesium peroxide MgO 2 is also known as a compound. (wikipedia.org)
  • Magnesium oxide is produced by the calcination of magnesium carbonate or magnesium hydroxide . (wikipedia.org)
  • Calcining at different temperatures produces magnesium oxide of different reactivity. (wikipedia.org)
  • As a construction material, magnesium oxide wallboards have several attractive characteristics: fire resistance, termite resistance, moisture resistance, mold and mildew resistance, and strength. (wikipedia.org)
  • Magnesium oxide is used extensively in the soil and groundwater remediation, wastewater treatment, drinking water treatment, air emissions treatment, and waste treatment industries for its acid buffering capacity and related effectiveness in stabilizing dissolved heavy metal species. (wikipedia.org)
  • Magnesium oxide , more commonly called magnesia , is a versatile mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction . (wikipedia.org)
  • As an environmentally friendly building material, magnesia board has strength and resistance due to very strong bonds between magnesium and oxygen atoms that form magnesium oxide crystals (with the chemical formula MgO). (wikipedia.org)
  • In a carbothermic reaction, heating with carbon converts the oxide into zinc vapor at a much lower temperature (around 950 °C). ZnO + C → Zn(Vapor) + CO Zinc oxide can react violently with aluminium and magnesium powders, with chlorinated rubber and linseed oil on heating causing fire and explosion hazard. (wikipedia.org)
  • Magnesium oxide was historically known as magnesia alba (literally, the white mineral from magnesia - other sources give magnesia alba as MgCO3), to differentiate it from magnesia negra, a black mineral containing what is now known as manganese. (wikipedia.org)
  • Mg2+ + Ca(OH)2 → Mg(OH)2 + Ca2+ Calcining at different temperatures produces magnesium oxide of different reactivity. (wikipedia.org)
  • In medicine, magnesium oxide is used for relief of heartburn and sour stomach, as an antacid, magnesium supplement, and as a short-term laxative. (wikipedia.org)
  • Side effects of magnesium oxide may include nausea and cramping. (wikipedia.org)
  • hydroxides
  • The surface of most metals consists of oxides and hydroxides in the presence of air. (wikipedia.org)
  • Phosphine oxides are generated as a by-product of the Wittig reaction: R3PCR'2 + R"2CO → R3PO + R'2C=CR"2 Another route to phosphine oxides is the thermolysis of phosphonium hydroxides: [PPhl + NaOH → Ph3PO + NaCl + PhH In the laboratory, phosphine oxides are usually generated by the oxidation, often accidentally, of tertiary phosphines: R3P + 1/2 O2 → R3PO Basic phosphines, such as trialkyl derivatives, are prone to this reaction. (wikipedia.org)
  • Iron oxides and oxide-hydroxides are wide spread in nature, play an important role in many geological and biological processes, and are widely used by humans, e.g., as iron ores, pigments, catalysts, in thermite (see the diagram) and hemoglobin. (wikipedia.org)
  • reacts
  • It is nearly insoluble in water, but it will dissolve in most acids, such as hydrochloric acid: ZnO + 2 HCl → ZnCl2 + H2O Solid zinc oxide will also dissolve in alkalis to give soluble zincates: ZnO + 2 NaOH + H2O → Na2[Zn(OH)ZnO reacts slowly with fatty acids in oils to produce the corresponding carboxylates, such as oleate or stearate. (wikipedia.org)
  • K2O is a basic oxide and reacts with water violently to produce the caustic potassium hydroxide. (wikipedia.org)
  • Upon heating, Rb2O reacts with hydrogen to rubidium hydroxide and rubidium hydride: Rb2O + H2 → RbOH + RbH For laboratory use, RbOH is usually used in place of the oxide. (wikipedia.org)
  • Instead, the hydroxide can be decomposed to the oxide (by reduction of the hydrogen ion) using Rb metal: 2 Rb + 2 RbOH → 2 Rb2O + H2 Metallic Rb reacts with O2, as indicated by its tendency to rapidly tarnish in air. (wikipedia.org)
  • compound
  • Physicists from the RIKEN Advanced Science Institute, Wako, the University of Tokyo and Osaka University have now discovered another intriguing phenomenon in the newly synthesized oxide compound LiRh2O4, which could lead to a more efficient generation of electricity from heat. (innovations-report.com)
  • Zinc oxide is an inorganic compound with the formula ZnO. (wikipedia.org)
  • Potassium oxide (K2O) is an ionic compound of potassium and oxygen. (wikipedia.org)
  • This pale yellow solid, the simplest oxide of potassium, is a rarely encountered, highly reactive compound. (wikipedia.org)
  • The parent compound phosphine oxide (H3PO) is unstable. (wikipedia.org)
  • Barium oxide, BaO, is a white hygroscopic non-flammable compound. (wikipedia.org)
  • Dimethylphosphine oxide is an organophosphorus compound with the formula (CH3)2P(O)H. It is a colorless liquid that soluble in polar organic solvents. (wikipedia.org)
  • hydrogen
  • Water is the oxide of hydrogen. (factmonster.com)
  • 2 K2O2 → 2 K2O + O2 Potassium hydroxide cannot be further dehydrated to the oxide but it can react with molten potassium to produce it, releasing hydrogen as a byproduct. (wikipedia.org)
  • chemistry
  • inorganic chemistry ) A yellow oxide of lead, PbO, used in the manufacture of paints and glass . (wiktionary.org)
  • Available either in small sizes as button cells , where the amount of silver used is minimal and not a significant contributor to the product cost, or in large custom-designed batteries, where the superior performance of the silver-oxide chemistry outweighs cost considerations. (wikipedia.org)
  • A related rechargeable secondary battery usually called a silver-zinc battery uses a variation of silver-oxide chemistry. (wikipedia.org)
  • Experimental new silver-zinc technology (different to silver-oxide) may provide up to 40% more run time than lithium-ion batteries and also features a water-based chemistry that is free from the thermal runaway and flammability problems that have plagued the lithium-ion alternatives. (wikipedia.org)
  • In organic chemistry, an allene oxide is an epoxide of an allene. (wikipedia.org)
  • cubic
  • Holmium oxide has a cubic , yet rather complex structure, with many atoms per unit cell and a large lattice constant of 1.06 nm. (wikipedia.org)
  • citation needed] ZnO + H2S → ZnS + H2O Zinc oxide crystallizes in two main forms, hexagonal wurtzite and cubic zincblende. (wikipedia.org)
  • typically
  • Typically the oxides of the trivalent lanthanides coexist in nature and separation of these components requires specialized methods. (wikipedia.org)
  • Phosphine oxides are typically (and appropriately) viewed as useless by-products in the Wittig reaction. (wikipedia.org)
  • occurs
  • The oxide, also called holmia , occurs as a component of the related erbium oxide mineral called erbia . (wikipedia.org)
  • Holmium oxide occurs in trace amounts in the minerals gadolinite , monazite , and in other rare-earth minerals . (wikipedia.org)
  • Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically. (wikipedia.org)
  • aluminium
  • A well-known example is aluminium foil, which is coated with a thin film of aluminium oxide that passivates the metal, slowing further corrosion. (wikipedia.org)
  • The aluminium oxide layer can be built to greater thickness by the process of electrolytic anodising. (wikipedia.org)
  • Occurrence
  • A common occurrence in oxides, this effect explains how the crystal distorts itself to gain energy by lifting the equivalence between the different orbital electronic states, in this case favoring the yz and zx orbitals over the xy ones. (innovations-report.com)
  • zinc
  • A silver-oxide battery uses silver(I) oxide as the positive electrode ( cathode ), zinc as the negative electrode ( anode ), plus an alkaline electrolyte, usually sodium hydroxide (NaOH) or potassium hydroxide (KOH). (wikipedia.org)
  • mineral
  • Typical examples are ilmenite (FeTiO 3 ), a mixed oxide of iron (Fe 2+ ) and titanium (Ti 4+ ) cations, the mineral perovskite and oxides sharing the perovskite structure and garnet . (wikipedia.org)
  • A typical extraction process of holmium oxide can be simplified as follows: The mineral mixtures are crushed and ground. (wikipedia.org)
  • reaction
  • In comparison, using the reaction of the corresponding phosphine oxides with perchloropolysilanes such as Si2Cl6 or Si3Cl8 in benzene or chloroform, phosphines can be prepared in higher yields. (wikipedia.org)
  • R3PO + Si2Cl6 → R3P + Si2OCl6 2 R3PO + Si3Cl8 → 2 R3P + Si3O2Cl8 Deoxygenation with perchloropolysilanes or trichlorosilane requires longer reaction times and is often problematic with sterically hindered or electron-deficient phosphine oxides. (wikipedia.org)
  • Barium oxide also has use as an ethoxylation catalyst in the reaction of ethylene oxide and alcohols, which takes place between 150 and 200 °C. It is also a source of pure oxygen through heat fluctuation. (wikipedia.org)
  • reactive
  • The parent allene oxide is CH2=C(O)CH2 (CAS RN 40079-14-9), a rare and reactive species of only theoretical interest. (wikipedia.org)
  • The hydroxide is more useful, less reactive toward atmospheric moisture, and less expensive than the oxide. (wikipedia.org)
  • produces
  • Treatment of the peroxide with potassium produces the oxide: K2O2 + 2 K → 2 K2O Alternatively and more conveniently, K2O is synthesized by heating potassium nitrate with metallic potassium: 2 KNO3 + 10 K → 6 K2O + N2 Other possibility is to heat potassium peroxide at 500 °C which decomposes at that temperature giving pure potassium oxide and oxygen. (wikipedia.org)
  • characteristic
  • This structure is characteristic of oxides of heavy rare-earth elements, such as Tb 2 O 3 , Dy 2 O 3 , Er 2 O 3 , Tm 2 O 3 , Yb 2 O 3 and Lu 2 O 3 . (wikipedia.org)
  • potassium
  • Potassium oxide is often not used directly in these products, but the amount of potassium is reported in terms of the K2O equivalent for whatever type of potash was used, such as potassium carbonate. (wikipedia.org)
  • Potassium chloride provides less potassium than an equal amount of potassium oxide. (wikipedia.org)