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Question

To find the concentration of a solution of a base by titration with a solution of an acid, which of the following represents the minimum data needed, assuming that the titration has been carried to the proper end point and that the equation for the reaction is known?
I. Volume of acid
II. Volume of base
III. Concentration of acid

I only

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III only

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I and II only

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I, II and III

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Solution

The correct option is D I, II and III
In acid-base titrations, at the equivalence point,
Moles of acid $=$ Moles of base
$⟹$ Volume of acid $\times$ Concentration of acid $=$ Volume of base $\times$ Concentration of base
Hence to determine the concentration of base, the minimum data needed is
$1.$ Volume of acid
$2.$ Volume of base
$3.$ Concentration of acid

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