Chemistry
What do you understand by an alkali? Give two examples of :
(a) strong alkalis
(b) weak alkalis
Acids Bases Salts
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Answer
An alkali is a base soluble in water. All alkalis form hydroxyl (OH-) ions in aqueous solution as the only negative ions. They turn red litmus blue.
(a) Strong alkalis — Sodium hydroxide [NaOH], Potassium hydroxide [KOH]
(b) Weak alkalis — Calcium hydroxide [Ca(OH)2], Ammonium hydroxide [NH4OH]
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