If `20 mL` of ethanol (density `=0.7893g//mL)` is mixed with `40mL` water (density `= 0.9971g//mL)` at `25^(@)C`, the final slution has density of `0.9571g//mL`. Calculate the percentage change in total volume of mixing. Also calculate the molarity of alcohol in the final solution.

If `20 mL` of ethanol (density `=0.7893g//mL)` is mixed with `40mL` wa

1.	If `20 mL` of ethanol (density `=0.7893g//mL)` is mixed with `40mL` water (density `= 0.9971g//mL)` at `25^(@)C`, the final slution has density of `0.9571g//mL`. Calculate the percentage change in total volume of mixing. Also calculate the molarity of alcohol in the final solution.
Answer» Correct Answer - `3.1 % 8.6` `C_(2)H_(5)OHrarrV_(1)=20 mL, d_(1)=0.7893 g//mL` `m_(1)=15.786 g` `H_(2)Orarr V_(2)=40 mL, d_(2) = 0.9971 g//mL`. `m_(2)=39.884 g` Total mass `= 55.65 g` `d_(sol)=0.9571 g//mL` `V_(sol) = 58.14 mL` % change `= (60-58.14)/(60)xx100 =3.1%` `m = (15.766xx1000)/(46xx39.884)=8.6`

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If `20 mL` of ethanol (density `=0.7893g//mL)` is mixed with `40mL` water (density `= 0.9971g//mL)` at `25^(@)C`, the final slution has density of `0.9571g//mL`. Calculate the percentage change in total volume of mixing. Also calculate the molarity of alcohol in the final solution.

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