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  2. Electrolysis of water - Wikipedia

    en.wikipedia.org/wiki/Electrolysis_of_water

    Thermodynamics. [edit] The electrolysis of water in standard conditions requires a theoretical minimum of 237 kJ of electrical energy input to dissociate each mole of water, which is the standard Gibbs free energyof formation of water. It also requires thermal energy to balance the change in entropy of the reaction.

  3. Fixed price of Coca-Cola from 1886 to 1959 - Wikipedia

    en.wikipedia.org/wiki/Fixed_price_of_Coca-Cola...

    According to the chronicle of Coca-Cola, "It was pronounced 'excellent' and placed on sale for five cents a glass" [2] (equivalent to $1.7 in 2023). Although most soda fountain drinks cost seven or eight cents at the time (for a 6.5 oz glass), Coca-Cola chose five cents and specifically marketed itself as an affordable option. [1]

  4. Bawls - Wikipedia

    en.wikipedia.org/wiki/Bawls

    The Baltimore Sun described Bawls' taste as citrus-flavored cream soda, and the soft drink gets its caffeine from the Amazonian guarana berry. [1]In 2002, a twelve-US-fluid-ounce (350 ml) bottle had 80 milligrams (1.2 gr) of caffeine, and cost about $1.00 (equivalent to $1.69 in 2023). [4]

  5. Drinking water quality standards - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality...

    Drinking water standards include lists of parametric values, and also specify the sampling location, sampling methods, sampling frequency, analytical methods, and laboratory accreditation ( AQC ). In addition, a number of standards documents also require calculation to determine whether a level exceeds the standard, such as taking an average.

  6. Self-ionization of water - Wikipedia

    en.wikipedia.org/wiki/Self-ionization_of_water

    e. The self-ionization of water (also autoionization of water, autoprotolysis of water, autodissociation of water, or simply dissociation of water) is an ionization reaction in pure water or in an aqueous solution, in which a water molecule, H 2 O, deprotonates (loses the nucleus of one of its hydrogen atoms) to become a hydroxide ion, OH −.

  7. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes and fittings.

  8. Properties of water - Wikipedia

    en.wikipedia.org/wiki/Properties_of_water

    Water is the chemical substance with chemical formula H 2 O; one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. [25] Water is a tasteless, odorless liquid at ambient temperature and pressure. Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue color. [3]

  9. Avoirdupois - Wikipedia

    en.wikipedia.org/wiki/Avoirdupois

    Such scales are used to make the most accurate of fine measurements, such as in the needs of empirical chemistry. Avoirdupois ( / ˌævərdəˈpɔɪz, ˌævwɑːrdjuːˈpwɑː /; [ 1] abbreviated avdp.) [ 2] is a measurement system of weights that uses pounds and ounces as units. [ 3][ 4] It was first commonly used in the 13th century AD and ...

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