ZuoTi.Pro
Question

A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 2.35 ∘C. What is the...

A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 2.35 ∘C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 ∘C. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) m m m = nothing nothing Submit Boiling points and molality Similar to the freezing-point depression, the boiling-point elevation ΔTb of a solution is quantitatively related to the molality m and the boiling-point-elevation constant Kb of the solvent by the equation ΔTb=Kbm where the boiling-point elevation is the difference between the boiling points of the solution and the pure solvent. Part C A solution of water (Kb=0.512 ∘C/m) and glucose boils at 102.56 ∘C. What is the molal concentration of glucose in this solution? Assume that the boiling point of pure water is 100.00 ∘C. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) m m m = nothing nothing

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
A solution of water (Kf=1.86 ∘C/m) and glucose freezes at − 2.35 ∘C. What is the...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Part B A solution of water (kr = 1.86°C/m) and glucose freezes at - 415°C What...

    Part B A solution of water (kr = 1.86°C/m) and glucose freezes at - 415°C What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 °C Express your answer to three significant figures and include the appropriate units. View Available Hint(s) m= 2.34 m Submit Previous Answers X Incorrect: Try Again: 5 attempts remaining Part A solution of water (K = 0.512 °C/m) and glucose boils at 101.56 °C. What...

  • part b and c please ( 5 of 15 A Review | Constants Periodic Table Part...

    part b and c please ( 5 of 15 A Review | Constants Periodic Table Part B A solution of water (Kf = 1.86°C/m) and glucose freezes at -- 2.35 °C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 °C. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) T'I HAO ? m= Value Units Submit A Review Constants Periodic Table AT)...

  • Molality, Freezing Point, and Boiling Point 29 of 44 - Part 3 Review Constants Periodic Table...

    Molality, Freezing Point, and Boiling Point 29 of 44 - Part 3 Review Constants Periodic Table Learning Goal Toute ring point depression or boling point elevation to din Pemola concentration of a solution The bring point, T. of a sortion is lower than the freezing point of the pure solvent. The difference in freezing point is called The treening point depression. AT AT - (solvent) - Tolution) The big pont, Th. of a solution is higher than the boting point...

  • Questions number 5 5. An aqueous solution of glucose (C6H1206) freezes at -5.25°C (Kf for water...

    Questions number 5 5. An aqueous solution of glucose (C6H1206) freezes at -5.25°C (Kf for water = 1.86 °C/n, Kb for water = 0.512 °C/n, freezing point of water = 0.00°C; boiling point of water = 100.0°C) a) Calculate the molality of the solution (S-points) Showu wrand worke b) Calculate the boiling point of the solution. (5 points) Show all set up and work !

  • 7. Consider the expression of Raoult's law, Psolution = Xsolvent ·P⁰solvent . Here, Psolution = vapor...

    7. Consider the expression of Raoult's law, Psolution = Xsolvent ·P⁰solvent . Here, Psolution = vapor pressure of the solution, P⁰solvent  = vapor pressure of pure solvent, Xsolvent  = mole fraction of the solvent. What is the mole fraction of solvent in a solution with a vapor pressure of 47.90 torr, if the vapor pressure of the pure solvent is 52.82 torr? 8. The boiling point of a solution increases directly as a function of the number of moles of...

  • A Review Constants Periodic Table The changes in boiling point (AT) or freezing point (AT) in...

    A Review Constants Periodic Table The changes in boiling point (AT) or freezing point (AT) in degrees Celsius from a pure solvent can be determined from the equations given here, respectively: AT) = m x K = moles of solute XK K. kilograms of solvent Since pure water boils at 100.00 °C, and since the addition of solute increases boiling point, the boiling point of an aqueous solution, Th, will be T - (100.00+AT) 'C Since pure water freezes at...

  • Review Constants Periodic Table The changes in boiling point (AT) or freezing point (AT) in degrees...

    Review Constants Periodic Table The changes in boiling point (AT) or freezing point (AT) in degrees Celsius from a pure solvent can be determined from the equations given here, respectively: Value Units moles of solute AT = mx Kb = 7 Submit kilograms of solvent XRb moles of solutex Kf Part B AT: = mx Kf = kilograms of solvent where m is the molality of the solution, and K and K the boiling-point-elevation and freezing-point-depression constants for the solvent,...

  • 1h. A certain pure solvent freezes at 39.8°C and has a freezing point depression constant Kf...

    1h. A certain pure solvent freezes at 39.8°C and has a freezing point depression constant Kf = 0.777°C/m. What is the predicted freezing point (in °C) of a solution made from this solvent that is (1.90x10^0) m in a non-electrolyte solute? 1i. When (8.23x10^1) g of a non-electrolyte is dissolved in (5.2600x10^2) g of a solvent (with Kb = 0.416°C/m) the boiling point of the solution is 1.50°C higher than the boiling point of the pure solvent. What is the...

  • Molal Boiling-Point-Elevation and Freezing-Point-Depression Solvent Normal Boiling Point (∘C) Kb (∘C/m) Normal Freezing Point (∘C) Kf...

    Molal Boiling-Point-Elevation and Freezing-Point-Depression Solvent Normal Boiling Point (∘C) Kb (∘C/m) Normal Freezing Point (∘C) Kf (∘C/m) Water, H2O 100.0 0.51 0.0 1.86 Benzene, C6H6 80.1 2.53 5.5 5.12 Ethanol, C2H5OH 78.4 1.22 -114.6 1.99 Carbon tetrachloride, CCl4 76.8 5.02 -22.3 29.8 Chloroform, CHCl3 61.2 3.63 -63.5 4.68 Part E freezing point of 2.02 g KBr and 4.84 g glucose (C6H12O6) in 187 g of water Part F boiling point of 2.02 g KBr and 4.84 g glucose (C6H12O6) in...

  • The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 12.31 grams...

    The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 12.31 grams of cobalt(II) acetate, Co(CH3COO)2 (177.0 g/mol), in 287.1 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is _____m. The boiling point of the solution is  °____C....

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT