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All alkalis are base but all …

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All alkalis are base but all base are not alkalis why?

Posted by Bhuwan Sing Limboo 6 years ago

CBSE > Class 10 > Science

3 answers

Abhi Technical 6 years ago

A water soluble base is called alkalies. But some bases are not soluble in water since we can say that all alkalies are base but all bases are not alkalies.

Gaurav Seth 6 years ago

A base is a substance that reacts with acids and neutrlize them. Some bases are soluble in water some are insoluble. Soluble bases are called alkalies.
For example copper oxide does not dissolve in water. Hence it is called as base.

Definition of an alkali: A base that is soluble in water is called an alkali.
In general hydroxides of alkali metals and alkaline earthmetals are considered as alkalies.
Example:
KOH (aq) → K⁺(aq) + OH^- (aq)
Ca(OH)₂(aq)→ Ca⁺² (aq) + OH^- (aq)

Therefore, it is said that all alkalis are bases, but all bases are not alkalies.

? ... 6 years ago

Because alkalis are water desolve bases but all the base but all the bases are not desolved in water

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