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
LuckyWell [14K]
2 years ago
9

Which has the lowest freezing point?

Chemistry
2 answers:
Likurg_2 [28]2 years ago
5 0

Answer: 0.5 M ionic AlCl_3

Explanation: Addition of nonvolatile solute depresses the freezing point of a solvent. As depression in freezing point is a colligative property, which means it depends on the amount of solute. Thus more is the no of ions, more is the depression in freezing point.

\Delta T=k_f\times m

\Delta T=Depression in freezing point

k_f= freezing point constant

m= molality

a) pure water: It is a pure solvent and freezes at 0 ° C.

b) 0.5M ionic NaCl:

NaCl\rightarrow Na^++Cl^-, it produces two ions, each of concentration 0.5M. The total concentration of ions is 1.0 M.

c) 0.5 M ionic CaCl_2

CaCl_2\rightarrow Ca^{2+}+2Cl^-, it produces two ions, Ca^{2+} of concentration 0.5M and Cl^- of concentration 2\times 0.5 M=1.0 M. The total concentration of ions is 1.5 M.

d) 0.5 M ionic AlCl_3

AlCl_3\rightarrow Al^{3+}+3Cl^-, it produces two ions, Al^{3+} of concentration 0.5 M and Cl^- of concentration 3\times 0.5 M=1.5 MThe total concentration of ions is 2.0 M.

e) 0.5 M molecular C_{12}H_{22}O_{11}

It is a covalent compound and do not dissociate into ions. thus the concentration will be 0.5 M only.

As the concentration of ions is highest in 0.5 M ionic AlCl_3, the depression in freezing point is highest ans thus it has lowest freezing point.


valkas [14]2 years ago
4 0
E has indeed the lowest freezing point.
You might be interested in
There are moles of carbon present in 100 g of a
rodikova [14]

Answer: 3.33

Explanation:

4 0
2 years ago
Which of the following is NOT an example of covalent bonding? * 2 points H20 NaF NH3 O2
Pachacha [2.7K]

Answer:

I THINK NH3

Explanation:

4 0
2 years ago
Which of the five most abundant elements are metals?
Gala2k [10]

Answer:

Oxygen

Silicon

Aluminium

Iron

Calcium

Explanation:

Oxygen=47 percent

Silicon=28 percent

Aluminium=8 percent

Iron=5 percent

Calcium=3.5 percent

Hope it helps :)

Mark me as brainliest

6 0
2 years ago
Consider the following isotopic abundance data for argon (Ar) and silicon (Si):
pshichka [43]

Answer:

Explanation:

Molar mass of Argon

= 35.96755 x .00337 + 37.96272 x .00063 + 39.96240 x .99600

= .12121 + .0239165 + 39.80255

= 39.95

Molar mass of silicon

27.97693 x .9223 + 28.97649 x .0467 + 29.97376 x .0310

= 25.803 + 1.35320 + .929

= 28.08

b )

No of atoms of Si  in 78.2 g = 78.2 x 6.02 x 10²³ / 28.08

= 16.76 x 10²³ .

c )

42 Ar / 40 Ar = 1.05006

42 Ar / 39.95 = 1.05006

42Ar = 41.95

2 )

C₁₆H₁₅F₂N₃O₄S

Mol weight = 16 x 12 + 1 x 15 + 2 x 19 + 3 x 14 + 4 x 16 + 32

= 192 + 15 + 38 + 42 + 64+ 32

= 383

No of molecules = .078 x 6.02 x 10²³ / 383

= 1.226 x 10²⁰ molecules .

7 0
2 years ago
Chemist question, helppp pls
Doss [256]

1: it is +2

2: it is +6

(Make this brainliest answer please)

8 0
2 years ago
Other questions:
  • How many milliliters of a 5.0 M H2SO4 stock solution would you need to prepare 101.5 mL of 0.17 M H2SO4?
    10·1 answer
  • An ideal sample weighing 1.28g at 127C (temp) and 1 atm has a volume of 0.250L. Determine the molar mass of the gas.
    9·1 answer
  • A sample of gas occupies a volume of 120.0 mL at a pressure of 0.75 atm and a temperature of 295 K. What will the volume be at a
    12·1 answer
  • Which properties of glass are a problem in transporting food<br>and drink?​
    11·1 answer
  • On a plateau on a heating curve, _____.
    12·1 answer
  • Uniformitarianism states that the geologic processes occurring in the past are the same processes that are occurring today.
    8·2 answers
  • The picture below shows an open field with wildflowers.
    10·1 answer
  • When 18.0 g H20 is mixed with 33.5 g Fe, which is the limiting reactant?
    12·1 answer
  • Electrolysis Is One of the Modern Technologies in Architecture’ Prepare an Investigatory Report That Supports the Statement”.​
    10·2 answers
  • What are some things that might happen that can change our air so that it is not health for plants?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!