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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?

Water is a weak electrolyte. It dissociates to small extent to give H₃O⁺ (aq) and OH^– (aq) ions as represented below:

Applying the law of chemical equilibrium,

Since the degree of dissociation of water is low, so its concentration remains practically unchanged. Thus [H₂O] may be taken as constant.

K × [H₂O]² = [H₃O⁺][OH^–]
or K_w = [H₃O⁺][OH^–]

where K_M,is constant and is known as an ionic product of water. It may be defined as the product of the hydronium ion concentration and hydroxyl ion concentration at a given temperature. The value of K_w at 298K is 1·008 × 10^–14 mol² L^–2.

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.

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?