# Chemistry

which solution has the highest boiling point?
a. 1 mole of NaNO3 in 500 g of water
b. 1mole of NaNO3 in 1000g of water
c. 1mole of NaNo3 in 750g of water
d. 1mole of NaNo3 in 250 g of water

The boiling point of water is elevated by about 0.5 degree for a 1 molal solution. The formula for this is
delta T = Kb*i* molality.
K is a constant which is about 0.5, i is the number of dissolved particles, and m is the molality.
For this problem you need to determine the number of dissolved particles, that is, i in the formula.
Since K is the same for all of them, that can be ignored.
delta T = i*m
See which one is the largest delta T.

so do i take the answer of NaNo3 which is 84 and the n devide it but the 500, 100, 750 and 250

No, you look at the molality of each.
molaltiy is defined as # mols/kg solvent.
The first one is
1mol/0.5 kg = 2m
The second one is
1 mol/1 kg = 1m
etc. The one with the largest m will be the one with the highest boiling point.

ok thanks i think i got it now

1. 👍 0
2. 👎 0
3. 👁 397

## Similar Questions

1. ### Chemistry

Which of the following statements about boiling points are false: A. the boiling point of 0.1 m KF(aq) is lower than the boiling point of 0.1 m ethanol(aq) B. the boiling point of a 0.5 m aqueous solution of NaOH is the same as

asked by Timothy on September 8, 2010
2. ### chemistry

Which of the following statements about boiling points are true? A. The boiling point of 0.1 m NaF(aq) is lower than the boiling point of 0.1 m methanol(aq). B. The boiling point of a 0.5 m aqueous solution of LiOH is the same as

asked by Anonymous on April 18, 2013
3. ### Chemistry

What is the boiling point elevation of a solution of NaNO3 (85.0 g/mol, complete dissociation) made by dissolving 10.0 g of NaNO3 into 200 g of water (Kb = 0.512◦C/m)?

asked by Anon on May 6, 2018
4. ### Chemistry

Pure water boils at 100ºC (212ºF). When a substance is added to the water the boiling point increases due to what is referred to as the boiling point elevation. (a) What is the molecular mass of sucrose (C₁₂H₂₂O₁₁)?

asked by Hannah on March 18, 2012
5. ### science

From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest

asked by Sal on October 5, 2010
6. ### AP Chemistry

From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest

asked by Anonymous on November 24, 2010
7. ### CHEM 2: Boiling Point

Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this

asked by kay on June 12, 2016
8. ### Chemistry Help

Which of the following exhibits the highest boiling point? HF, HCl, HBr, or HI Which of the following exhibits the highest boiling point? CH3CH3, CH3COOH, or CH3OCH3 How can you determine the highest boiling point of these?

asked by Kyle on December 8, 2015
9. ### Chemistry

What is the boiling point of a 25.20% (m/v) KNO3 solution ? (Kf of water = 1.86 0C/molal) (Kb of water = .52 0C/molal) (molar mass potassium nitrate = 101.10324 g/mole) The density of the solution is 1.09 g/ml What is the molarity

asked by Sean on March 31, 2013
10. ### Chemistry

When given different elements and asked for the highest boiling point, do you figure out the molar mass and pick the highest one as the highest boiling point?

asked by Sarah on December 7, 2015

More Similar Questions