What is the change in the freezing point of a solution made by dissolving 14.7 g of
C6H1206 into 150 ml of water? Answer in 2 decimal.
The density of water is 1.00 g/ml and and Kf = 1.86 °C/m

Question

02-08-2021
Chemistry

Answered

Westonci.ca is your trusted source for finding answers to all your questions. Ask, explore, and learn with our expert community. Ask your questions and receive precise answers from experienced professionals across different disciplines. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.

What is the change in the freezing point of a solution made by dissolving 14.7 g of
C6H1206 into 150 ml of water? Answer in 2 decimal.
The density of water is 1.00 g/ml and and Kf = 1.86 °C/m

Sagot :

We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Westonci.ca is your go-to source for reliable answers. Return soon for more expert insights.

Why is the Senate considered the "upper house?"

Which statement about the migration from cities to suburbs in the 1950s is correct? A. More middle-class families could afford to purchase their own homes. B. S

In Puerto Rico , what major event happened in 1873? a. the island was discovered c. It was built "El Morro" b. slavery was abolished d. killed many Tainos

What were the Native Americans trying to do when they took over Alcatraz? A. acquire more housing B. make people aware of Indian grievances C. take the warde

find three consecutive even integers such that the sum of the smallest integer and twice the second is 12 more than the third (only an algebraic solution will b

Which country had a communist dictator, and fought on the side of the Allies? Select one: a. Germany b. Soviet Union c. Italy d. Spain

Which figure, a square or a trapezoid, will rotate onto itself in 90 degrees ?

What is the noble gas configuration for oxygen?

The hourly salary of five workers are $6, $6, $8, $10, and $35. Is the mean or median the best measure of center to summarize the salaries of the workers? A.

If an infant is born to a drinking mother without any observable evidence of abnormal development, can we conclude that there was no detrimental impact of alcoh

jbferrado jbferrado · Answer 1 · 2021-08-06T08:45:08-04:00

The change in freezing point is 1.02°C

The change in the freezing point (ΔTf) is calculated from the following equation:

ΔTf = i x Kf x m

Given:

i = 1 (Van't Hoff factor, is equal to 1 because the solute is a nonelectrolyte)

Kf = 1.86°C/m (Freezing point constant of the solvent)

m = molality

We have to calculate the molality (m), which is equal to the moles of solute in 1 kg of solvent:

m = moles solute/ kg solvent

The solute is C₆H₁₂O₆. Thus, we calculate the moles of solute by dividing the mass into its molecular weight (Mw):

Mw(C₆H₁₂O) = (12 g/mol C x 6) + ( 1 g/mol H x 12) + (16 g/mol O x 6) = 180 g/mol

moles solute = mass C₆H₁₂O/Mw(C₆H₁₂O) = 14.7 g/(180 g/mol) = 0.082 mol

The solvent is water. Its mass (in kg) is obtained from the volume and the density, as follows:

kg solvent = V x density = 150 mL x 1.00 g/mL x 1 kg/1000 g = 0.15 kg

Now, we calculate the molality (m):

m = moles of solute/kg solvent = 0.082 mol/(0.15 kg) = 0.546 m

Finally, we calculate the change in freezing point:

ΔTf = i x Kf x m = 1 x 1.86°C/m x 0.546 m = 1.02°C

To learn more about freezing point depression, you can visit this content:

https://brainly.com/question/4258941

Sagot :

Other Questions