AP Chemistry

A 25.0g sample of glucose, C6H12O6, dissolves in 525mL of distilled water.

a. what is the boiling point elevation of the solution over the pure solvent?
b. At what temperature will the solution boil at sea level?


I'm not a fan of these types of questions. This is the work I did for A:

boiling point elevation is
deltaT = i*Kb*m
i=7 kb=.512
moles of solute is 25g/180gpermole = .139 moles of glucose

i believe it's assumed that mL is grams, so 525 mL = 525g

and because (i believe) you need molality of solvent, this is what i have:

mols solvent/kg solvent
= 29mol water/.525kg water = 55.56

and finally, in the actual formula:

deltaT = 7(.512)(55.56)
= 199.11


For some reason this answer doesn't seem right. What am I doing wrong here? Also, how do you do part B?

Thank you so much!

  1. 👍
  2. 👎
  3. 👁
  1. I don't know how you got i=7 lol
    Way off - do you even know what i is?

    1. 👍
    2. 👎
  2. you have everything right except you molality is moles of solute over kg of solvent so it would be .139/.525 for molality.

    1. 👍
    2. 👎
  3. I is 1. This is a covalent molecule

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6)in 100.g of H20? Kf for water is 1.86C/m.

  2. chemistry

    The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9 g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0°C to

  3. chemistry

    a sample of glucose, c6h12o6 contains 2.03*10^21 atoms of carbon. (a)how many atoms of hydrogen does it contain? (b)how many molecules of glucose does it contain? (c)how many moles of glucose does it contain? (d)what is the mass

  4. chem

    Consider the fermentation reaction of glucose: C6H12O6 ----) 2C2H5OH+2CO2 A 1.00-mol sample of C6H12O6 was placed in a vat with excess yeast. If 35.1 g of C2H5OH was obtained, what was the percent yield of C2H5OH?

  1. Chemistry

    What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6) in 100 g of H2O? Kf for water is 1.86oC/m

  2. Chemistry

    When the sugar glucose, C6H12O6 is burned in air, carbon dioxide and water vapor are produced. Write the balanced chemical equation for this process, and calculate the theoretical yield of carbon dioxide when 1.00 g of glucose is

  3. Chemistry: Stoichiometry

    calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)

  4. Chemistry

    The average human requires 120.0 grams of glucose (C6H12O6) per day. How many grams of CO2 ( in the photosynthesis reaction) are required for this amount of glucose? The photosynthetic reaction is: 6 CO2 + 6 H2O = C6H12O6 + 6 O2

  1. Chemistry

    Carbon dioxide gas and liquid water form solid glucose (C6H12O6) and oxygen gas during photosynthesis. Chlorophyll absorbs light in the 600-700 nm region. a) Write a balanced thermochemical equation for the formation of 1.00 mol

  2. chemistry

    The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas. C6H12O6(aq) + 6 O2(g) → 6 CO2(g) + 6 H2O(l) Calculate the volume of dry CO2 produced at body temperature (37°C)

  3. gen chem

    A sample of glucose C6H12O6 contains 2.03x10^21 atoms of carbon. how many atoms of hydrogen does it contain? mole of H= 6.02x10^23/2.03x10^21? i don't know if my formula is right and i also don't know where to get the mole of H.


    how many grams of glucose, C6H12O6 and water are in 600g of 5.5% by mass glucose solution? please indicate the general formula to use to solve this problem.

You can view more similar questions or ask a new question.