In chemistry, an alkali is an aqueous (from water) solution with a pH value of more than 7.The word 'Alkali' comes from the Arabic 'qali' meaning 'from the ashes' since ashes mixed with water used as cleaning products (such as soaps) are made of alkali materials.
An alkali is where a base is dissolved in water. Often it is the salt of an Alkali metal
An alkali is the opposite to an acid and can be neutralised (brought down to pH 7) by adding acid.
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