Alkali Guide, Meaning , Facts, Information and Description
In chemistry, an alkali is the solution of a base in water. Since a base is defined as a substance which yields or creates hydroxide ions when dissolved in water, an alkali is a solution of hydroxide anions and their corresponding positively charged cations.
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2 Confusion between base and alkali 3 Alkali salts 4 Alkali soil 5 Brief Etymology |
Common properties of alkalis include:
The terms base and alkali are often used interchangeably but many of the substances referred to as alkalis are more correctly bases. To clarify: an alkali is a type of base (one which has been dissolved in water) but the undissolved form is not an alkali. So while people often refer to common bases – like calcium carbonate or ammonia – as alkalis, strictly speaking, only when they are dissolved in water – in these cases becoming carbonate and ammonium ions respectively – can they be called alkalis. Due to the prevalent use of alkali in this manner though, it is difficult to fault it outside of carefully worded scientific prose.
Demonstrating the extent of the intrenched misuse of the term alkali, most basic salts are commonly referred to as alkali salts.
Common alkali salts include:
Soil with a pH above 7.4 is normally referred to as alkaline. This soil property can occur naturally, due to the presence of alkali salts. Although some plants do prefer slightly basic soil (including cabbage family vegetables and buffalograss), most plant prefer a mildly acidic soil (pH between 6.0 and 6.8), and high pH levels can cause a problem.
In alkali lakes (a type of salt lake), evaporation concentrates the naturally occurring alkali salts, often forming a crust of mildly basic salt across a large area.
The word "alkali" is derived from the Arabic phrase "from ash", referring to the original source of alkaline substance. Ashes were used in conjunction with animal fat to produce soap, a process known as saponification.
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This is an Article on Alkali. Page Contains Information, Facts Details or Explanation Guide About Alkali Common properties of alkalis
Confusion between base and alkali
Alkali salts
Alkali soil
Brief Etymology