Question

19. Which of the following aqueous solutions has the highest freezing point (assume 100% dissociation for...

19. Which of the following aqueous solutions has the highest freezing point (assume 100% dissociation for all soluble ionic compounds)?

A) 0.10m Mg(NO3 )2 (an electrolyte)

B) 0.11m Na2SO3 (an electrolyte)

C) 0.17m MgCO3 (an electrolyte)

D) 0.18m NaCl (an electrolyte)

E) 0.29m C6H12O6 (not an electrolyte)

Homework Answers

Answer #1

ΔTf = i*Kf*m

ΔTf is the depression in freezing point

ΔTf will be maximum when i*m is maximum

so,

freezing point will be lowest when i*m is maximum

freezing temperature is maximum when ΔTf will be minimum

i is the number of ions that a compound can break into

A)

Mg(NO3)2

i = 3

Mg(NO3)2 breaks into 1 Mg2+ ion and 2 NO3- ions

so,

i*m = 3*0.10 = 0.30

B)

Na2SO3

i = 3

so,

i*m = 3*0.11 = 0.33

C)

MgCO3

similarly:

i = 2

i*m =2*0.17 = 0.34

D)

NaCl

i = 2

i*m = 2*0.18 = 0.36

E)

C6H12O6

This is non electrolyte

i = 1

i*m = 0.29

i*m is lowest for E.

So, E will have lowest freezing point

E

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Calculate the ionic strength (?μ) for each of the aqueous solutions. Assume 100% dissociation of the...
Calculate the ionic strength (?μ) for each of the aqueous solutions. Assume 100% dissociation of the salts. Ignore any hydrolysis reactions. A solution of 0.265 M FeCl3. u=___________________ A solution of 0.316 M Ca(NO3)2 u=________________________ A solution of 0.160 M NaCl and 0.168 M Na2So4 u=___________________________
Rank these aqueous solutions from lowest freezing point to highest freezing point. I. 0.40 m C2H6O2...
Rank these aqueous solutions from lowest freezing point to highest freezing point. I. 0.40 m C2H6O2 II. 0.20 m Na3PO4 III. 0.30 m KNO3 IV. 0.20 m C6H12O6
12. Which of the following aqueous solutions would be expected to have the lowest freezing point?...
12. Which of the following aqueous solutions would be expected to have the lowest freezing point? A) 0.400 m K2SO4 B) 0.400 m NaCl C) 0.400 m C6H12O6 (glucose) D) 0.040 m K2SO4 E) 0.040 m NaCl
list the following aqueous solutions in order of their expected freezing point: 0.50m CaCl2, 0.15m NaCl,...
list the following aqueous solutions in order of their expected freezing point: 0.50m CaCl2, 0.15m NaCl, 0.10m HCl, 0.05m CH3 COOH, 0.10m C12 H22 O11
Which one of the following aqueous solutions would have the lowest freezing point? Explain your reasoning....
Which one of the following aqueous solutions would have the lowest freezing point? Explain your reasoning. 0.030M HCl 0.025M Mg(NO3)2 0.020M BaCl2 0.025 M HC2H3O2
Which one of the following aqueous solutions will have the largest freezing point depression with respect...
Which one of the following aqueous solutions will have the largest freezing point depression with respect to pure water? (A) 0.4 M LiOH (B) 0.6 M glucose (C) 0.3 M Na3PO4 (D) 0.3 M K2CO3 (E) 0.4 M NaCl Please include an explanation!
Which of the following aqueous solutions will have the lowest freezing point? a. 0.04 m sodium...
Which of the following aqueous solutions will have the lowest freezing point? a. 0.04 m sodium sulfate, Na2SO4 b. 0.08 m magnesium chloride, MgCl2 c. 0.1 m potassium chloride, KCl d. 0.05 m sodium chloride, NaCl e. 0.1 m magnesium sulfate, MgSO4
Which of the following aqueous solutions has the highest boiling point.? Kb for water is 0.52...
Which of the following aqueous solutions has the highest boiling point.? Kb for water is 0.52 Celsius/m a) 0.3 m potassium chloride b) 0.4 m hydrofluroic acid c) 0.2 m sodium sulfate d) 0.2 aluminum nitrate e) cannot be determined
Which of the following aqueous solutions would have the highest boiling point? Solve the boiling point...
Which of the following aqueous solutions would have the highest boiling point? Solve the boiling point for the correct one. A. .50 M NaSO3 B. 1.0 M NaCI C. 2.0 M C6H14 D. 1.5 M HCI E. .5 M (NH4)3 PO4
show ALL WORK. 6) Place the following solutions in order of INCREASING normal boiling point. NOTE:...
show ALL WORK. 6) Place the following solutions in order of INCREASING normal boiling point. NOTE: substances that have LDF only have very low normal boiling points. Use the van’t Hoff factor in the limit of infinite dilution. There are 7 substances. NOTE: the order format MUST be: Q < R < S < T, etc.             0.050 m CaCl2,            0.15 m NaCl,               Cl2,                  0.10 m HCl,             0.050 m HCOOH,       0.10 m C12H22O11,                              CH3OH 7)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT