Short Answer TypeWhat are the limitations of Lewis concept of acids and bases ?
(i) The concept fails to recognise the relative strength of acids and bases.
(ii) Formation of a coordination compound is a slow process but acid-base reactions are fast. This concept could not explain this behaviour.
(iii) Protonic acids (H2SO4, HCl, HNO3) do not form a coordinate bond with bases and therefore are not included in the Lewis acids.
(iv) The catalytic activity of many acids is due to H+ ion. Since a Lewis acid need not contain hydrogen hence many Lewis acids will not have catalytic activity.
Long Answer TypeJustify the statement: All Bronsted bases are Lewis bases, but all Bronsted acids are not Lewis acids.
Short Answer TypeOut of Lowry Bronsted concept and Lewis concept, which is regarded as better and why?
Long Answer TypeShort Answer TypeThe ionic product of water is 0·11 × 10–14 at 273 K; 1·0 × 10–14 at 298K and 51 × 10–14 at 373K. Deduce from this data whether the ionisation of water into hydrogen and hydroxide ion is exothermic or endothermic.
Long Answer TypeComment on the statement: An acidic solution contains OH– ions and even a basic solution contains H3O+ ions.
Or
How the values of Kw, [H3O+] and [OH–] are affected if acid or base is added to pure water at 298K?
Short Answer Type
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