Question

In industry, the concentration of a solution can either be denoted by symbol 'w/w' or 'v/v. Now, if 25 ml of ethanol is mixed with enough water to produce 200 mL of the solution, then the concentration of the solu- tion is: A 12.5% (v/v) B. 1.25% (v/v) C. 12.5% (w/w) 1.25%(w/w) ​

Answer 1

Answer:

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Answer 2

Volume concentration can be expressed as $\\ \frac{v}{v} \%$, which means volume per volume.

This is used when both the solute and the solvent are liquid or aqueous.

It is widely used in industry to determine the concentration.

 $\\ \frac{v}{v}\% =\frac{ volume of solue}{ volume of solution} \%$

Given,

Volume of solute$\\ = 25 ml$

volume of solution$\\ = 200 mL$

Then,  

 $\\ \frac{v}{v}\% =\frac{ 25}{ 200} \%$

Hence, the answer to the question is option (A)12.5% (v/v)