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221.
How does Lewis concept account for the acidic character of carbon dioxide?

The molecule is linear and is represented as O = C = O. Under the influence of attacking Lewis base such as OH^–, one electron pair from the multiple bonds gets shifted towards the oxygen atom (oxygen is more electronegative than carbon). As a result, the carbon atom in CO₂ becomes electron deficient and thus it acts as Lewis acid.

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222.

What are the limitations of Lewis concept of acids and bases ?

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Long Answer Type

223.

Justify the statement: All Bronsted bases are Lewis bases, but all Bronsted acids are not Lewis acids.

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Short Answer Type

224.

Out of Lowry Bronsted concept and Lewis concept, which is regarded as better and why?

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Long Answer Type

225.

What do you understand by ionic product of water?

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Short Answer Type

226. What is the effect of temperature on (ionic product of water)?

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227.

The 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.

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Long Answer Type

228.

Comment on the statement: An acidic solution contains OH^– ions and even a basic solution contains H₃O⁺ ions.
Or
How the values of K_w, [H₃O⁺] and [OH^–] are affected if acid or base is added to pure water at 298K?