Two acids ‘A’ and ‘B’ were kept in beakers. Acid ‘A’ undergoes partial dissociation in water, whereas acid ‘B’ undergoes complete dissociation in water.
i) Of the two acids ‘A’ and ‘B’ , which is weak acid and which is strong acid?
ii) What is a weak acid?
iii) What is a strong acid?
iv) Give one example each.
(i) We know that a strong acid undergoes complete dissociation in water whereas a weak acid undergoes only partial dissociation in water. In the case as mentioned in the question the acid ‘A’ undergoes partial dissociation in water, whereas acid ‘B’ undergoes complete dissociation in water. Hence, acid A is a weak acid and acid B is a comparatively strong acid.
(ii) Weak acids are those chemical species which undergoes only partial dissociation in water and is not able to dissociate completely to release all of its H+ ions.
(iii) Strong acids are those chemical species which undergoes complete dissociation in water and are able to dissociate completely to release all of its H+ ions.
(iv) An example of weak acid is – acetic acid.
An example of a strong acid is – Sulphuric acid
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