Suppose that you add 25.6 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 2.64 oC compared to pure benzene. What is the molar mass (in g/mol) of the unknown compound?
(a) Suppose that you add 25.6 g of an unknown molecular compound to 0.250 kg of benzene, which has a
Kf of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 2.64 oC compared to pure benzene.
What is the molar mass (in g/mol) of the unknown compound?
(b) What is the freezing point (in degrees Celcius) of 3.77 kg of water if it contains 170.1 g of CaBr2 ? The freezing point depression constant for water is 1.86 oC/m and the molar mass of
CaBr2 is 199.89 g/mol.
(c) What mass, in grams, of NaCl needs to be added to 1.6 kg of water in order to create a solution with a freezing point of -6.0 °C? The freezing point depression constant of water is 1.86 ºC/m.
(d) What mass, in grams, of NaCl needs to be added to 1.6 kg of water in order to create a solution with a freezing point of -6.0 °C? The freezing point depression constant of water is 1.86 ºC/m.
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Introduction to General, Organic and Biochemistry](https://www.bartleby.com/isbn_cover_images/9781285869759/9781285869759_smallCoverImage.gif)
![General, Organic, and Biological Chemistry](https://www.bartleby.com/isbn_cover_images/9781285853918/9781285853918_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Introduction to General, Organic and Biochemistry](https://www.bartleby.com/isbn_cover_images/9781285869759/9781285869759_smallCoverImage.gif)
![General, Organic, and Biological Chemistry](https://www.bartleby.com/isbn_cover_images/9781285853918/9781285853918_smallCoverImage.gif)
![Chemistry](https://www.bartleby.com/isbn_cover_images/9781305957404/9781305957404_smallCoverImage.gif)
![Chemistry: An Atoms First Approach](https://www.bartleby.com/isbn_cover_images/9781305079243/9781305079243_smallCoverImage.gif)
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781337399074/9781337399074_smallCoverImage.gif)
![Chemistry & Chemical Reactivity](https://www.bartleby.com/isbn_cover_images/9781133949640/9781133949640_smallCoverImage.gif)