JoJo asked in Science & MathematicsChemistry · 1 decade ago

what is an alkali?

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  • 1 decade ago
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    In chemistry, an alkali is a basic, ionic salt of an alkali metal or alkali earth metal element.

    Alkalis are best known for being bases (compounds with pH greater than 7) that dissolve in water.

    All alkalis have a pH greater than seven and hence can be detected with litmus paper (litmus will turn blue on contact with an alkali).

    Most alkalis have a pH of 10 or greater. This means that they will turn phenolphthalein from colorless to pink.

    Caustic (causing chemical burns).

    Alkaline solutions are slippery or soapy to the touch (due to the caustic reaction dissolving the surface of the skin and fingerprint).

    Alkalis normally form aqueous solutions (although some like barium carbonate are only soluble when reacting with an acidic aqueous solution).

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  • 3 years ago

    What Is An Alkali

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  • 1 decade ago

    Alkali - Any compound having marked basic properties

    Base - A compound of a metal or a metal-like group, with hydrogen and oxygen in the proportion to form an OH radical, which ionizes in aqueous solution to yield hydroxyl ions. A base is formed when a metallic oxide reacts with water.

    Source(s): Lange Handbook of Chemistry
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  • 1 decade ago

    Alkalis react with acids to form a salt and water. (aka neutralisation)

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  • Anonymous
    5 years ago

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    RE:

    what is an alkali?

    Source(s): alkali: https://tr.im/ncFKi
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