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Equilibrium

Short Answer Type

221.

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

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222.

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

406 Views

Long Answer Type

223.

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

377 Views

Short Answer Type

224.

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

168 Views

Long Answer Type

225.

What do you understand by ionic product of water?

101 Views

Short Answer Type

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

714 Views

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.

From the given data for the ionic product of water at different temperature, it is clear that ionic product of water increases with the increase in temperature. Ionic product of water is the product of [H⁺] and [OH^–], this means that with the increase in temperature H⁺ and OH^– increase. In other words, increase in temperature favours the forward reaction. This is possible only for the endothermic reaction according to Le-Chatelier’s principle. Hence ionisation of water to [H⁺] and [OH^–] is an endothermic reaction.

108 Views

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?