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  2. Water-reactive substances - Wikipedia

    en.wikipedia.org/wiki/Water-reactive_substances

    Water-reactive substances [1] are those that spontaneously undergo a chemical reaction with water, often noted as generating flammable gas. [2] Some are highly reducing in nature. [ 3 ] Notable examples include alkali metals , lithium through caesium , and alkaline earth metals , magnesium through barium .

  3. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    In the intermediate reaction, the carbonic acid reacts exothermically with sodium hydroxide to form sodium carbonate and water: H 2 CO 3 + 2NaOH –> Na 2 CO 3 + 2H 2 O + heat. In the final reaction, the sodium carbonate reacts with the slaked lime (calcium hydroxide) to form calcium carbonate and sodium hydroxide: Na 2 CO 3 + Ca(OH) 2 ...

  4. Sodium carbonate - Wikipedia

    en.wikipedia.org/wiki/Sodium_carbonate

    Hard water usually contains calcium or magnesium ions. Sodium carbonate is used for removing these ions and replacing them with sodium ions. [16] Sodium carbonate is a water-soluble source of carbonate. The calcium and magnesium ions form insoluble solid precipitates upon treatment with carbonate ions:

  5. Black snake (firework) - Wikipedia

    en.wikipedia.org/wiki/Black_snake_(firework)

    A white mixture of sucrose and sodium bicarbonate will eventually turn black and the snake will grow about 15–50 centimetres (5.9–19.7 in) long after it is lit. [4] Three chemical reactions occur when the snake is lit. Sodium bicarbonate breaks down into sodium carbonate, water vapor, and carbon dioxide: [2] 2 NaHCO 3 (s) → Na 2 CO 3 (s ...

  6. Lye - Wikipedia

    en.wikipedia.org/wiki/Lye

    The reaction between sodium hydroxide and some metals is also hazardous. Aluminium, magnesium, zinc, tin, chromium, brass and bronze all react with lye to produce hydrogen gas. Since hydrogen is flammable, mixing a large quantity of lye with aluminium could result in an explosion. Both the potassium and sodium forms are able to dissolve copper.

  7. 11-Year-Old Girl Who Tried to Save Boy, 12, After He Fell ...

    www.aol.com/lifestyle/11-old-girl-tried-save...

    Dec. 8, police officers and firefighters responded to the incident at around 4:30 p.m., and the 12-year-old boy's body was recovered from the water about three hours later.

  8. Christmas means oyster roasts in this Southern state ... - AOL

    www.aol.com/christmas-means-oyster-roasts...

    World's Oldest Man, Dead At 112, Ate This Meal Every Friday "It's very common for Gullah Geechee natives to have friends and family over for an oyster roast, hosted in their backyards.

  9. Chalconatronite - Wikipedia

    en.wikipedia.org/wiki/Chalconatronite

    Chalconatronite is a carbonate mineral and rare secondary copper mineral that contains copper, sodium, carbon, oxygen, and hydrogen, its chemical formula is Na 2 Cu(CO 3) 2 •3(H 2 O). [2] Chalconatronite is partially soluble in water, and only decomposes, although chalconatronite is soluble while cold, in dilute acids. [ 3 ]