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3 years ago

How does adding a non-volatile solute to a pure solvent affect the boiling point of the pure solvent?

2 answers:

7 0

Colligative properties depend on the amount of solute dissolved in a solvent. These set of properties do not depend on the type of species present. These properties include freezing point depression, boiling point elevation, osmotic pressure and vapor pressure lowering. The correct answer is the second option. The solvent will have a higher boiling point.

andriy [413]3 years ago

5 0

Answer:

The correct answer is The solvent will have a higher boiling point

Explanation:

This question will be better understood with the knowledge of colligative property. The colligative properties of a solution are properties that are determined by the concentration of solute in the solution and not the identity of the solute. There are four colligative properties and one of them has been presented in the question.

Consider this common example, when a non-volatile solute like salt is added to a pure solvent like water, the boiling point of the solvent (which is water) becomes increased hence the colligative property here is that, the solute causes the elevation/increase in the boiling point of the solvent. This is the reason why pure water will boil earlier than an aqueous salt solution (like ocean water).

Thus, from the question, it can be said that when the non-volatile solute is added to the solvent, the solvent will have a higher boiling point.

You might be interested in

Calculate the work, w, gained or lost by the system when a gas expands from 15 L to 45 L against a constant external pressure of

marta [7]

Answer:

Work done by the system = 4545 J

Explanation:

The expression for the calculation of work done is shown below as:

$w=-P\times \Delta V$

Where, P is the pressure

$\Delta V$ is the change in volume

From the question,

$\Delta V$ = 45 - 15 L = 30 L

P = 1.5 atm

$w=-1.5\times 30\ atmL$

Also, 1 atmL = 101 J

So,

$w=-1.0\times0.75\times 101\ J=-4545\ J$ (negative sign implies work is done by the system)

Work done by the system = 4545 J

6 0

3 years ago

What is the pH of a solution with a hydrogen ion concentration of 4.5 x 10-6 M ?

Fittoniya [83]

Answer:

Explanation:

The pH of a solution can be found by using the formula

$pH = - log [ {H}^{+} ]$

We have

$pH = - log(4.5 \times {10}^{ - 6} ) \\ = 5.346787...$

We have the final answer as

Hope this helps you

6 0

3 years ago

Determine the rate law and the value of k for the following reaction using the data provided.NO2(g) + O3(g) → NO3(g) + O2(g)[NO2

Anton [14]

Answer:

Rate = 43 M⁻¹s⁻¹[NO₂][O₃]

Explanation:

We need to find the reaction order in

rate = (NO₂ )ᵃ (O₃ )ᵇ

given:

( NO₂ ) M ( O₃ ) M Rate M/s

0.10 0.33 1.420 (1)

0.10 0.66 2.840 (2)

0.25 0.66 7.10 (3)

When keeping the NO₂ concentration constant in the first two while doubling the concentration of O₃ , the rate doubles. Therefore it is first order with respect to O₃

Comparing (2) and (3) increasing the concentration of NO₂ by a factor of 2.5 and keeping O₃ constant , increased the rate by a factor of 2.5. Therefore the rate is first order with respect to NO₂

Then rate law is

= k (NO₂) (O₃ )

To find k take any of the three and substitute the values to find k:

1.420 M/s = k (0.10)M x (0.33)M ⇒ k = 43 /Ms

Then the answer is Rate = 43 M⁻¹s⁻¹[NO₂][O₃]

6 0

4 years ago

I’m confused and I don’t understand this, can someone help?

stellarik [79]

Wilma- tt

Wilbur- TT

c) 100% chance

d) 100% chance

it has been a while since I've done this so it could be wrong but im pretty sure its correct

Wilbur's family claims it is pure so they have TT

and his wife simply has big eyes so its tt

so the chances of their children having either eye shape is 100%

I'm sorry- im not too good at explaining it ><

3 0

3 years ago

The specific spatial arrangement of amino acid residues that are close to each other in the polypeptide chain is called______the

natulia [17]

Answer:

c. tertiary.

Explanation:

In this case, we can review the definition of each level of structuration in the proteins:

Primary structure

In the primary structure, the amino acids are linked by peptide bonds. That is, the order of the amino acids is the criterion that defines this type of structure.

Secondary structure

In the secondary structure, we have to look at the way in which the protein is folded. The options are:

-) Beta-laminar: A structure in which the protein has a planar shape.

-) Alpha-helix: A structure in which the protein has a cross-strand form.

Tertiary structure

In the tertiary structure, the R groups that the amino acids have in the primary structure can generate interactions with each other. Interactions such as hydrogen bridges, dipole-dipole, hydrophobic interactions. This makes the protein have a very specific three-dimensional structure, on which its function depends.

Quaternary structure

In the quaternary structure, several subunits may be attached, or there may be prostatic groups (metals that can help to attach various protein units).

With all these in mind, the deffinition that fits with the description in the question is the tertiary structure.

I hope it helps!

4 0

3 years ago