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
lozanna [386]
3 years ago
9

Calculate the boiling point of a 2.00 molal solution of magnesium perchlorate, mg(clo4)2, in water.

Chemistry
1 answer:
vova2212 [387]3 years ago
5 0

Answer:

103.06°C.

Explanation:

  • To solve this problem, we can use the relation:

<em>ΔTb = i.Kb.m,</em>

Where, i is the van 't Hoff factor.

Kb is the molal boiling point  elevation constant of water (Kb = 0.51°C/m).

m is the molality of the solution (m = 2.0 m).

  • We need to define and find the van 't Hoff factor (i):

<em>van 't Hoff factor</em> is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass.

  • Mg(ClO₄)₂ is dissociated according to the equation:

<em>Mg(ClO₄)₂ → Mg²⁺ + 2ClO₄⁻,</em>

1 mol of Mg(ClO₄)₂ produces 3 mol of ions (1 mol Mg²⁺ and 2 mol ClO₄⁻).

∴ i = 3/1 = 3.

∴ ΔTb = i.Kb.m = (3)(0.51 °C/m)(2.0 m) = 3.06 °C.

∵  ΔTb = the boiling point in presence of solute (Mg(ClO₄)₂) - the boiling point of pure water.

The boiling point of pure water = 100.0°C.

<em>∴ The boiling point in presence of solute (Mg(ClO₄)₂) = ΔTb + the boiling point of pure water =</em> 3.06 °C + 100.0°C = <em>103.06°C.</em>

You might be interested in
Acids are described as corrosive because they a. turn litmus blue. b. taste bitter. c. “eat away” at other materials. d. feel sl
Masteriza [31]

Answer:

C

Explanation:

acids are corrosive since they tend to destroy every single thing they do get a big example is the acidic rain which tends to corrode iron sheet thus making them to appear worn out and full of rust

4 0
3 years ago
Read 2 more answers
Consider the following properties: I) The red color of rubies is due to the presence of chromium ions. II) Objects made of silve
quester [9]

Answer:

II) Objects made of silver become tarnished.

Explanation:

Physical properties are the properties which can be observed without changing identity of substance.

Chemical properties are the properties which describe how the substance changes into the different substance completely.

Boiling is an example of physical change in state of the substance. Color is also an example of physical property like boiling point and hence these are constants. The reason of the color is that the chromium ions shows certain colors as the electrons are excited due to absorption of the light. The tarnishing of the silver is an example of the chemical change which occurs due to the reaction of the silver with oxygen. This is also known as corrosion.

5 0
4 years ago
Which of the following describes a scenario in which the molecular geometry would have the smallest bond angle(s)? (A) four bond
maw [93]

Answer: The correct answer is "B" two bonding domains(or bonding pairs) or two non bonding domains(or lone pairs)

Explanation:

Molecular geometry/structure is a three dimensional shape of a molecule. It is basically an arrangement of atoms in a molecule.It is determined by the central atom, its surrounding atoms and electron pairs.According to VSEPR theory, there are 5 basic shapes of a molecule: linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral.

A)Four bonding domains and zero non bonding domains: shape is tetrahedral and bond angle is 109.5°

B)Two bonding domains and two non bonding domains(lone pairs): shape is bent and bond angle is 104.5°

C)Three bonding domains and one non bonding domain: shape is trigonal pyramidal and bond angle is 107°

D)Two bonding domain and zero non bonding domain: shape is linear and bond angle is 107°

E)Two bonding domain and one non bonding domain: bent shape and bond angle is 120°

F)Three bonding domains and zero nonbonding domain: shape is trigonal planar and bond angle is 120°

Hence Two bonding domains and two non bonding domains have the smallest bond angle.

6 0
3 years ago
What is the chemical name for K2Se
Oduvanchick [21]

Answer:

Potassium selenide

Explanation:

Potassium selenide (K2Se)

6 0
3 years ago
Read 2 more answers
What coefficient values will balance the reaction shown? CS2 + Cl2? CCl4 + S2Cl2 A. 1,1,1,1 B. 1,3,1,1 C. 2,1,1,1 D. 1,2,1,2
Talja [164]
The answer is B. 1,3,1,1.

Brady
5 0
3 years ago
Other questions:
  • Where is most of the mass of an atom? •
    9·1 answer
  • What is a possible cause of a large percentage of error in an experiment where mgo is produced from the combustion of magnesium?
    15·2 answers
  • Do you know any of these?
    15·2 answers
  • What is the relationship between the following compounds??
    12·1 answer
  • What type of bond is neon?
    10·1 answer
  • Given 6 moles of CuCl2, how many moles of AlCl, were made? SHOW the math below​
    14·1 answer
  • Differences between hypothesis and theory​
    9·2 answers
  • How many meters are present in the 12.45 miles? Please show your work, and report your answer with the correct number of signifi
    6·1 answer
  • Which of the following is true for the equilibrium constant of a reaction?
    14·1 answer
  • Doing another onee! 50 points for answering thiss!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!