enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Barium hydroxide - Wikipedia

    en.wikipedia.org/wiki/Barium_hydroxide

    Reaction with hydrogen sulfide produces barium sulfide. Precipitation of many insoluble, or less soluble barium salts, may result from double replacement reaction when a barium hydroxide aqueous solution is mixed with many solutions of other metal salts. [17] Reactions of barium hydroxide with ammonium salts are strongly endothermic.

  3. Standard enthalpy of formation - Wikipedia

    en.wikipedia.org/wiki/Standard_enthalpy_of_formation

    Monatomic hydrogen Gas H 218 Hydrogen: Gas H 2: 0 Water: Gas H 2 O −241.818 Water: Liquid H 2 O −285.8 Hydrogen ion: Aqueous H + 0 Hydroxide ion: Aqueous OH −: −230 Hydrogen peroxide: Liquid H 2 O 2: −187.8 Phosphoric acid: Liquid H 3 PO 4: −1288 Hydrogen cyanide: Gas HCN 130.5 Hydrogen bromide: Liquid HBr −36.3 Hydrogen chloride ...

  4. Standard Gibbs free energy of formation - Wikipedia

    en.wikipedia.org/wiki/Standard_Gibbs_free_energy...

    The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).

  5. Aqueous solution - Wikipedia

    en.wikipedia.org/wiki/Aqueous_solution

    In an aqueous solution the hydrogen ions (H +) and hydroxide ions (OH −) are in Arrhenius balance ([H +] [OH −] = K w = 1 x 10 −14 at 298 K). Acids and bases are aqueous solutions, as part of their Arrhenius definitions. [1] An example of an Arrhenius acid is hydrogen chloride (HCl) because of its dissociation of the hydrogen ion when ...

  6. Barium hydride - Wikipedia

    en.wikipedia.org/wiki/Barium_hydride

    2 Reactions. 3 References. ... Barium hydride can be prepared by reacting elemental barium with hydrogen at relatively high temperatures between 150-200 °C: [2] ...

  7. Barium hydroxide (data page) - Wikipedia

    en.wikipedia.org/wiki/Barium_hydroxide_(data_page)

    This page provides supplementary chemical data on barium hydroxide. Material Safety Data Sheet SIRI ... Δ f H o gas: −626.56 kJ/mol Standard molar entropy, S o gas ...

  8. Barium - Wikipedia

    en.wikipedia.org/wiki/Barium

    Barium hydroxide ("baryta") was known to alchemists, who produced it by heating barium carbonate. Unlike calcium hydroxide, it absorbs very little CO 2 in aqueous solutions and is therefore insensitive to atmospheric fluctuations. This property is used in calibrating pH equipment. Barium compounds burn with a green to pale green flame, which is ...

  9. List of aqueous ions by element - Wikipedia

    en.wikipedia.org/wiki/List_of_aqueous_ions_by...

    This reaction occurs quantitatively with salts of the alkali-metals at low to moderate concentrations. [citation needed] With salts of divalent metal ions, the aqua-ion will be subject to a dissociation reaction, known as hydrolysis, a name derived from Greek words for water splitting. The first step in this process can be written as [citation ...