# Chemistry

posted by .

Which of the following solutes in aqueous solution would be expected to exhibit the smallest freezing-point lowering (assuming ideal behavior?

0.1 m NaCl
.2 m CH3COOH
.05 m Al2(SO4)3
.1 m MgCl2
.25 m NH3

What would be the steps to picking the right option? Because just picking .05 because it appears to be the smallest amount is likely wrong.

• Chemistry -

delta T = i*Kf*m
Since Kf is constant we can forget that. dT depends upon i and m so
i*m for each.
NaCl is 0.1*2 = ? for i = 2
CH3COOH is 0.2*1 for i = 1
Al2(SO4)3 is 0.05*5 for i = 5
MgCl2 i = 3
NH3 i = 1
The greatest i*m causes the greatest dT (or the smallest i*m causes the least dT).

## Similar Questions

1. ### chem101

Which of the following solutes in aqueous solution would be expected to exhibit the LARGEST freezing-point lowering (assuming ideal behavior)?
2. ### chemistry lab

calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
3. ### chemistry

calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
4. ### chemistry

calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
5. ### chemistry

calculate the necessary amounts of solutes and solvent to make a 4l bottle of antifreeze that will have a 35 degree change in the freezing point of water. soultes are: Al2(SO4), KBr) and Mg(NO3)2.
6. ### chemistry

A sample of aluminum sulfate 18-hydrate, Al2(SO4)3 ยท 18 H2O, containing 157.0 mg is dissolved in 1.000 L of solution. Calculate (a) molarity of Al2(SO4)3 (b) molarity of SO42- (c) molality of Al2(SO4)3, assuming that the density of …
7. ### Chemistry

Which of the following pairs of compounds will give a precipitate in a diluted solution?
8. ### Chemistry:Freezing Points

The freezing point lowering of a saturated aqueous solution of NaCl is 17 Celsius. Would spreading salt on the icy sidewalks be beneficial when the temperature outside is -8 Fahrenheit?
9. ### Chemistry

Which of the following solutes, dissolved in 1000g of water, would provide a solution would the lowest freezing point?
10. ### Chemistry

Minimum elevation in boiling point is given by a solution of 1. 0.1M Urea 2. 0.1 NaCL 3. 0.1 Mgcl2 4. 0.1M AL2(So4)3

More Similar Questions