BASE & ALKALIS
Many compounds have properties which are contrary to acids. Such compounds are termed as bases. The bases which are soluble in water are called alkalis.The word alkali has been taken Arabic word "qali" which means "from ashes". Alkali are obtained from the ashes of plants.
Alkalis & Bases are the compounds which produce hydroxide ions (OH-) in their aqueous solution. Sodium hydroxide(NaOH), Potassium hydroxide(KOH),Calcium hydroxide (Ca(OH)2 etc, are the example of bases / alkalis. Some important alkalis and their formulae are given table.
Some common alkalis and their formulae.
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Commonly used alkalis as laboratory reagents are shown below in reagents bottles.
Common alkalis used in laboratory
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