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
Marta_Voda [28]
3 years ago
12

What is the boiling point of a solution of 76 g of water dissolved in 500 mL of acetic acid, CH3COOH?

Chemistry
2 answers:
tatuchka [14]3 years ago
6 0

Answer:

127.3° C, (This is not a choice)

Explanation:

This is about the colligative property of boiling point.

ΔT = Kb . m . i

Where:

ΔT = T° boling of solution - T° boiling of pure solvent

Kb = Boiling constant

m = molal (mol/kg)

i = Van't Hoff factor (number of particles dissolved in solution)

Water is not a ionic compound, but we assume that i = 2

H₂O →  H⁺  +  OH⁻

T° boling of solution - 118.1°C =  0.52°C . m . 2

Mass of solvent =  Solvent volume / Solvent density

Mass of solvent = 500 mL / 1.049g/mL → 476.6 g

Mol of water are mass / molar mass

76 g / 18g/m = 4.22 moles

These moles are in 476.6 g

Mol / kg = molal → 4.22 m / 0.4766 kg = 8.85 m

T° boling of solution =  0.52°C . 8.85 m . 2 + 118.1°C =  127.3°C

creativ13 [48]3 years ago
5 0

Answer : The boiling point of a solution is, 142.5^oC

Explanation :

Formula used for Elevation in boiling point :

\Delta T_b=i\times k_b\times m

or,

T_b-T^o_b=i\times k_b\times \frac{w_2\times 1000}{M_2\times w_1}

where,

T_b = boiling point of solution = ?

T^o_b = boiling point of acetic acid = 118^oC

k_b = boiling point constant  of acetic acid = 2.93^oC/m

m = molality

i = Van't Hoff factor = 1

w_2 = mass of solute (water) = 76 g

w_1 = mass of solvent (acetic acid) = Density\times Volume=1.049g/mL\times 500mL=524.5g

M_2 = molar mass of solute (water) = 18 g/mol

Now put all the given values in the above formula, we get:

(T_b-118)^oC=1\times (2.93^oC/m)\times \frac{(76g)\times 1000}{18g/mol\times (524.5g)}

T_b=142.5^oC

Therefore, the boiling point of a solution is, 142.5^oC

You might be interested in
Use Lewis theory to determine the chemical formula for the compound formed between Mg and Br. Group of answer choices Mg3Br2 Mg2
IceJOKER [234]

Answer:

MgBr2

Explanation:

(Mg^2+) + (Br^1-)

For every Mg we need 2 Br to balance out the compound.

5 0
2 years ago
At 273 k and 1.00 x 10^-2 atm, the density of a gas is 1.24 x 10^-5 g/cm3.
bija089 [108]

Root mean square velocity is the square root of the mean of the squares of speeds of different molecules. From kinetic theory of gas, the formula of root mean square velocity=C_{rms}= √\frac{3RT}{M}=√\frac{3PV}{M}=√\frac{3P}{d}, where, R= Universal gas constant, T= Absolute temperature, P= Pressure, V= Volume of gas, d= Density of gas.

Given,  T=273 K, P=1.00 x 10⁻² atm, d=1.24 x 10⁻⁵ g/cm³.

(a) Using the formula C_{rms}=√\frac{3P}{d}=√(3X1.00X10⁻²)/(1.24X10⁻⁵)=49.18

(b) Molar mass can be determined by using the formula C_{rms}=√{3RT}{M}

49.18=√\frac{3X8.314X273}{M}

49.18²=√(3X8.314X273)/M

M=\frac{3X8.314X273}{49.18^{2} }

M=1.67 ≅ 2

Molecular mass is 2.

(c) The gas is Helium (He) whose molecular mass is 2.

8 0
3 years ago
Read 2 more answers
Automobile bodies contain significant amounts of iron. The iron is protected by the addition of zinc. This is called galvanizati
Oksana_A [137]

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

Galvanization is defined as the process in which a protective layer of zinc is applied to iron or steel to prevent the metal from rusting.

Zinc prevents the oxidation of iron and acts as a reducing agent in the process.

The half reaction for the process follows:

<u>Oxidation half reaction:</u>  Zn\rightarrow Zn^{2+}+2e^-

<u>Reduction half reaction:</u>  Fe^{2+}+2e^-\rightarrow Fe

Net chemical equation:  Zn+Fe^{2+}\rightarrow Zn^{2+}+Fe

Hence, the balanced chemical equation is written above.

6 0
3 years ago
An example of gaining potential energy
aleksandr82 [10.1K]

Answer:

An example for gaining potential energy would be: A glass bottle on the top of a high shelf would have more high potential energy than a glass bottle on the middle or bottom shelf because it has a long way or more farther to fall down or brake.

Explanation:

Remember Potential Energy is the restored energy of an object has.

I hope this helps you!

5 0
3 years ago
If you try to balance an equation by changing subscripts you change...
aksik [14]

Answer:

kwkrofofoxosowoqoaododpdprofpcoxozoskawkdjdn

Explanation:

sklwlrlfclxoskkekrdododosoekekrkrododowoekekfkdodkwkeororkdkdkwejrjrkfidiwi3jr

8 0
3 years ago
Other questions:
  • On the graph, indicate the average kinetic energy of the population at T1 and T2.
    12·1 answer
  • The progress of the reaction:
    11·1 answer
  • 19. Which of the following statements is accurate? A. If an object is said to be decelerating, its velocity must be increasing.
    10·2 answers
  • Wind is related to the movement of warm and cold air masses. Which kind of heat transfer does this represent?
    15·1 answer
  • You are given a 1.50 g mixture of sodium nitrate and sodium chloride. you dissolve this mixture into 100. ml of water and then a
    14·1 answer
  • What is the name of this organic compound?
    7·1 answer
  • Which surface ocean current has the warmest water.
    9·2 answers
  • What most determines the entropy of a solid? A. The mobility of electrons in the solid B. The crystalline structure of the solid
    13·2 answers
  • 10. Write the formula for the compounds: copper (1) chloride and copper (II) chloride
    10·1 answer
  • Is decay pool or flux
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!