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  2. Sulfuric acid - Wikipedia

    en.wikipedia.org/wiki/Sulfuric_acid

    The corresponding equilibrium constant for water, K w is 10 −14, a factor of 10 10 (10 billion) smaller. In spite of the viscosity of the acid, the effective conductivities of the H 3 SO + 4 and HSO − 4 ions are high due to an intramolecular proton-switch mechanism (analogous to the Grotthuss mechanism in water), making sulfuric acid a good ...

  3. Valence (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Valence_(chemistry)

    The valence is the combining capacity of an atom of a given element, determined by the number of hydrogen atoms that it combines with. In methane, carbon has a valence of 4; in ammonia, nitrogen has a valence of 3; in water, oxygen has a valence of 2; and in hydrogen chloride, chlorine has a valence of 1.

  4. Equivalent weight - Wikipedia

    en.wikipedia.org/wiki/Equivalent_weight

    The equivalent weight of an element is the mass of a mole of the element divided by the element's valence. That is, in grams, the atomic weight of the element divided by the usual valence. [2] For example, the equivalent weight of oxygen is 16.0/2 = 8.0 grams.

  5. Sulfurous acid - Wikipedia

    en.wikipedia.org/wiki/Sulfurous_acid

    Sulfurous acid is commonly known to not exist in its free state, and due to this, it is stated in textbooks that it cannot be isolated in the water-free form. [4] However, the molecule has been detected in the gas phase in 1988 by the dissociative ionization of diethyl sulfite. [5]

  6. Sulfate - Wikipedia

    en.wikipedia.org/wiki/Sulfate

    The sulfate or sulphate ion is a polyatomic anion with the empirical formula SO 2− 4.Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life.

  7. Hume-Rothery rules - Wikipedia

    en.wikipedia.org/wiki/Hume-Rothery_rules

    Valency factor: two elements should have the same valence. The greater the difference in valence between solute and solvent atoms, the lower the solubility. Solid solution rules for multicomponent systems

  8. 15 holiday gifts for dementia patients and caregivers ...

    www.aol.com/15-holiday-gifts-dementia-patients...

    11. A memory phone can store photos with names and contact information. 12. Puzzles and activity books stimulate the brain and promote cognitive sharpness.. 13. Card games and board games ...

  9. Pauling's rules - Wikipedia

    en.wikipedia.org/wiki/Pauling's_rules

    Second rule: the electrostatic valence rule [ edit ] For a given cation, Pauling defined [ 2 ] the electrostatic bond strength to each coordinated anion as s = z ν {\displaystyle s={\frac {z}{\nu }}} , where z is the cation charge and ν is the cation coordination number.