A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water.

a) What is the molality of the resulting solution?

b) What is the mole fraction of water in this solution?

B)
moles of h2o=118g/18(g/mol)=6.548 mol

moles of c12h22O11= 3.44g/342.3(g/mol)=0.010 mol

--->6.5556 mol/(6.5556 mol + 0.010 mol= 0.998 mol

A)
M= (0.010)/(0.00344 kg + 0.118 kg)= 0.823 m c12h22O11

1. 👍 0
2. 👎 0
3. 👁 172
1. I think you have missed the point for A.

For B you haven't been consistent with significant figures and you have different numbers (but close) for the same operation.
mols H2O = 118/18.0 = 6.556 which I would round to 6.56
mols C12H22O11 = 3.44/342 = 0.010
total mols = 6.56+0.01 = 6.57
6.56/6.57 = 0.998

For a.
m stands for molality. M is for molarity.
m = mols solute/kg solvent
m = 0.01/0.118 = ?

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemisty

A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution?

asked by Kate on January 14, 2014

A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.5556

asked by Kate on January 16, 2014
3. ### chem

A solution is prepared by dissolving 75.0 grams of sucrose (C12H22O11) in enough water to produce 1.00L of solution. What is the molarity of this solution?

asked by antu on December 3, 2012
4. ### chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. a)what is the molar mass of sucrose? How would i do that??

asked by Miley on April 5, 2008
5. ### chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. a)what is the molar mass of sucrose? I know the formula to use, but can someone show me how do to it, by actually plugging in the numbers.

asked by Miley on April 6, 2008
6. ### chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. what is the molality of that solution? how would i do this???

asked by Miley on April 5, 2008
7. ### chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. what is the molality of that solution? I know what formula to use, but can someone please show me all the steps to get the answer. Thanks:)

asked by Miley on April 6, 2008
8. ### CHEMISTRY- molality

a sucrose solution was prepared by dissolving 13.5g sucrose in enough water to make 100ml of solution. the density is 1.050gml. calculate molality

asked by lucy on October 9, 2010
9. ### chem!

A solution was prepared by dissolving 0.163 g of sugar, (C12H22O11 MW = 3423gmol) in 100.00 mL water. What is the molarity of this solution?

asked by eve on April 13, 2009
10. ### Chemistry

The reaction for the metabolism of sucrose, C12H22O11, is the same as for its combustion in oxygen to yield CO2(g) and H2O(l). The standard heat of formation of sucrose is -2230 kJ mol-1. Based upon data in Table 6.2 and problem

asked by Jessica on June 29, 2011

More Similar Questions