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
ivann1987 [24]
3 years ago
8

The normal freezing point of water (H2O) is 0.00 oC and its Kf value is 1.86 oC/m. A nonvolatile, nonelectrolyte that dissolves

in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH2OHCH2OH (62.10 g/mol), must be dissolved in 280.0 grams of water to reduce the freezing point by 0.400 oC
Chemistry
1 answer:
adelina 88 [10]3 years ago
6 0

Answer:

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

Explanation:

One colligative property is the freezing point depression due the addition of a solute. The equation is:

ΔT=Kf*m*i

<em>Where ΔT is change in temperature = 0.400°C</em>

<em>Kf is freezing point constant of the solvent = 1.86°C/m</em>

<em>m is molality of the solution (Moles of solute / kg of solvent)</em>

<em>And i is Van't Hoff constant (1 for a nonelectrolyte)</em>

Replacing:

0.400°C =1.86°C/m*m*1

0.400°C / 1.86°C/m*1 = 0.215m

As mass of solvent is 280.0g = 0.2800kg, the moles of the solute are:

0.2800kg * (0.215moles / 1kg) = 0.0602 moles of solute must be added.

The mass of ethylene glycol must be added is:

0.0602 moles * (62.10g / mol) =

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

<em />

You might be interested in
How many protons, and neutrons are in nuclide tin-115?
HACTEHA [7]
50 protons
65 neutrons
8 0
3 years ago
Read 2 more answers
When lewis structures are drawn, do you only show valence electrons??
Lynna [10]
Yes you do cause its more explanation to
 <span />
8 0
3 years ago
Which part of the atmosphere is the highest layer in which planes fly
denis23 [38]
The layer of atmosphere that MOST planes fly in is called the troposphere.
6 0
3 years ago
Read 2 more answers
Write chemical equation for solid cadmium carbonate, water, and carbon dioxide
Alchen [17]
I think this is it
Cd(HCO3)2---->CdCO3+H2O+CO2

Sorry if this is wrong
4 0
3 years ago
How many different design ideas of the puff car do you need to draw? Question options:
Makovka662 [10]

Answer:

Im not really sure

Explanation:

I think 6 or 3

5 0
2 years ago
Read 2 more answers
Other questions:
  • If two balls have the same volume, but ball A has twice as much mass as ball B, which one will have the greater
    7·2 answers
  • You have seven closed containers, each with equal masses of chlorine gas (cl2). you add 10.0 g of sodium to the first sample, 20
    6·1 answer
  • When heated, solid copper(ii) carbonate decomposes to solid copper(ii) oxide and carbon dioxide gas. give the balanced chemical
    9·1 answer
  • How many grams of water can be produced in the combination of
    14·1 answer
  • What are negative charged particles orbiting the nucleus called?
    10·1 answer
  • Part b (r)–3-chloro-2-methylhexane will undergo a nucleophilic substitution reaction in the presence of sodium ethoxide and etha
    13·1 answer
  • What would the result be of adding one proton to an atom​
    15·1 answer
  • For each of the following balanced equations, calculate how many grams of each product would be produced by complete reaction of
    14·1 answer
  • Which of the following activities is most likely to result in nutrient pollution?
    12·1 answer
  • You have 700,000 atoms of a radioactive substance. After 2 half-lives have past, how
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!