Homework Help

why is it when 50cm3 of water is mixed with 50cm3 of alcohol, the total volume of the...

user profile pic

adelejan | Student, Grade 10 | (Level 2) eNoter

Posted August 20, 2012 at 5:25 AM via web

dislike 1 like

why is it when 50cm3 of water is mixed with 50cm3 of alcohol, the total volume of the two liquids is less than 100cm3?

1 Answer | Add Yours

user profile pic

jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted August 20, 2012 at 7:07 AM (Answer #1)

dislike 1 like

`Water = H_2O`

`Ethanol = CH_3CH_2OH`

 

In `H_2O` , H is positively charged and in ethanol O is negatively charged. When these two mix with each other a powerful hydrogen bond can form between H atoms in water and O atoms in ethanol. So the ethanol particles will partially slide in to the water particles.Due to this they will come closer and will pack closely. This result in slightly decrease in the total volume.

 

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes