1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nadya68 [22]
3 years ago
11

List the following aqueous solutions in order of decreasing freezing point: 0.040 m glycerin (C3H8O3), 0.020 m potassium bromide

(KBr), 0.030 m phenol (C6H5OH). Rank solutions from highest to lowest freezing point. To rank items as equivalent, overlap them.
Chemistry
1 answer:
gogolik [260]3 years ago
5 0

Answer:

Solutions from highest to lowest freezing point:

0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol

Explanation:

\Delta T_f=i\times K_f\times m

\Delta T_f = Depression in freezing point

i = van'T Hoff fcator

K_f = Molal depression constant of solvent

m = molality of the solution

Higher the value of depression in freezing point at  lower will be freezing temperature the solution.

1. 0.040 m glycerin

Molal depression constant of water = K_f=1.86^oC/m

i = 1 ( organic molecule)

m = 0.040 m

\Delta T_{f,1}=1\times\times 1.86^oC/m\times 0.040 m

\Delta T_{f,1}=0.0744^oC

2. 0.020 m potassium bromide

Molal depression constant of water = K_f=1.86^oC/m

i = 2 (ionic)

m = 0.020 m

\Delta T_{f,2}=2\times\times 1.86^oC/m\times 0.020 m

\Delta T_{f,2}=0.0744^oC

3. 0.030 m phenol

Molal depression constant of water = K_f=1.86^oC/m

i = 1 (organic)

m = 0.030 m

\Delta T_{f,3}=1\times\times 1.86^oC/m\times 0.030 m

\Delta T_{f,3}=0.0558^oC

0.0744^oC=0.0744^oC > 0.0558^oC

\Delta T_{f,1}=\Delta T_{f,2}>\Delta T_{f,3}

Solutions from highest to lowest freezing point:

0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol

You might be interested in
I have asked this before, to get more points, just put the same answer on the other questions
aleksklad [387]
The standard atomic weight is the average mass of an element in atomic mass units ("amu"). Though individual atoms always have an integer number of atomic mass units, the atomic mass on the periodic table is stated as a decimal number because it is an average of the various isotopes of an element.
8 0
3 years ago
2.When copper (II) nitrate reacts with sodium hydroxide, copper (11) hydroxide is produced.
Ann [662]

Answer:

 

2Cu + S ~~~> Cu2S Copper (C) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction.

Explanation:

7 0
3 years ago
3.) All matter has both physical and chemical properties. A physical property is one that does not change the chemical nature of
dexar [7]

Answer:

D

Explanation:

It would be D because you are observing the reaction and don’t change anything

8 0
2 years ago
URGENT!!! A solution in which there is very little solute dissolved in a solvent.
ella [17]

Answer:

Is called a diluted solution

Explanation:

Having little solute makes the dissolving process in a large amount of solvent very easy to mix therefore it dilutes in the solvent

4 0
3 years ago
Indicate which of the following statements is FALSE.a. Covalent bonds connect nucleotides in a strand; noncovalent interactions
LenaWriter [7]

Answer:

The false statement is d Avery,Macleod and McCarty showed that DNA is the genetic information of cells and RNA is the genetic information in the viruses .

Explanation:

Avery,Macleod and MacCarty showed that DNA is the genetic material of the cell.

     On the other hand Fraenkel, Conrat and Sanger carried out their experiment on tobacco mosaic virus to prove that RNA act as genetic material in some viruses.

8 0
3 years ago
Other questions:
  • Which two factors contributed to the extinction of many large mammals over the last several million years, including woolly mamm
    12·2 answers
  • Naturally occurring boron has an atomic mass of 10.810 amu consists of two isotopes. One of those isotopes is 10B with an isotop
    15·2 answers
  • A solution contains AgNO3 and Ba(NO3)2. What substance could be added to the solution to precipitate Ag ions, but leave Ba2 ions
    9·1 answer
  • PLEASE HELP ! 2 questions
    13·2 answers
  • Convert each of the potentials. The silver–silver chloride and calomel reference electrodes are saturated with KCl,KCl, resultin
    9·1 answer
  • Disease causing bacteria need oxygen to survive.<br> true or false
    12·2 answers
  • Which explains one reason evaporation can be used to separate a mixture? The desired component has a higher boiling point than t
    5·2 answers
  • Which phase or phases of matter take(s) the shape of its container?
    14·1 answer
  • The soil of the rainforest is nutrient poor. How do plants that have roots in the rainforest floor obtain the nutrients they nee
    8·2 answers
  • .) Neon and HF have approximately the same molecular masses. a.)Explain why the boiling points of Neon and HF differ b.)Compare
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!