Short Answer Type
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?
Lewis concept of acids and basis is regarded as better than Bronsted concept due to the following reasons:
(i) Many species which are acids and bases according to Bronsted and Arrhenius concept are also covered by Lewis concept.
(ii) The acidic and basic character of certain species can be explained only with the help of Lewis concept. For example, acidic nature of CO2 and basic nature of CaO can not be explained by any other concept except the Lewis concept.
(iii) According to Lewis concept, an acid need not contain the element hydrogen but it must be electron deficient in nature. For example AlCl3 is an acid though it has no H+ion present.
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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