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
vladimir1956 [14]
3 years ago
15

What is the boiling point of a solution made using 759 g of sucrose, c12h22o11, in 0.300 kg of water, h2o?

Chemistry
1 answer:
Ray Of Light [21]3 years ago
3 0
According to the boiling point elevation formula:

ΔTb = i * Kb * m

- when i is the van't Hoff factor for sucrose = 1 

as the sucrose is an organic molecule so, there is no dissociation in water so i = 1
- Kb is the ebullioscopic constant of the solvent (water) = 0.512°C Kg mol-1

 - and when m is the molality = moles sucrose / Kg water

so, we need first to get moles sucrose = mass/molar mass

                                                                 = 759 g / 342.3 g/mol

                                                                 = 2.22 moles 

∴ m = 2.22 moles / 0.3 Kg

       = 7.4 mol/kg

by substitution on ΔTb:

∴ΔTb = 1 * 0.512 * 7.4 

          = 3.8 

∴Tb = 100 °C + 3.8 = 103.8 °C
You might be interested in
We kept adding pbi2 into water until no more will dissolve. what is the concentration of lead (ii) iodide in the solution
blsea [12.9K]

PbI(ii) ionization in the solution of PBI(ii) into water is:

<span>PbI</span>₂(solution) <==> Pb₂⁺ + 2I⁻

If the conc. of PbI(ii) in the sol. is xM then the conc. of Lead(ii) will be x M and conc. of iodide will be 2 x M.

Therefore,

<span>Ksp=<span>[Pb</span></span>²⁺][I-]²

Plugging the values:

1.4×10⁻⁸ = x ⋅ (2x)²

1.4×10⁻⁸ = 4x³

x³ = {1.4×10⁻⁸}÷4

x³ = 0.35 x 10⁻⁸

or 

x³ = 3.5 x 10⁻⁹

x = 1.51 x 10⁻³

Hence,

Concentration of iodide ions in the solution:

2x = 3.02 x 10⁻³ 

6 0
3 years ago
Which statements are true of solutions?
Dimas [21]

Answer: they contain solutes and solvents, their particles must be evenly distributed, they may contain solid liquid and gas simultaneously, and they are homogeneous matter.

Explanation:

4 0
3 years ago
PLEASE HELP WILL MARK YOU AS BRAINLEST
kozerog [31]
It is a very large seamount and island created by hot-spot volcanism
7 0
3 years ago
The atmosphere is held together by
IgorC [24]

Answer:

Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth's gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere.

Explanation:

4 0
3 years ago
Read 2 more answers
Choose the TRUE statement. A. Laurasia broke up to form Pangaea and Gondwanaland. B. Pangaea broke up to form Laurasia and Gondw
Amanda [17]
B is the correct answer since both Gondwanaland and Laurasia both technically came after pangaea
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these elements is unlikely to form covalent bonds? s, h, mg, ar, si?
    6·2 answers
  • What are chemical symbols used for
    6·1 answer
  • Calculate the energy provided by a slice of bread containing 2 g of protein, 1 g of fat, and 20 g of carbohydrate. record your a
    8·1 answer
  • How can you separate a mixture of dry materials
    8·1 answer
  • Which type of substance is soft has a low melting point is a poor conductor of heat and electricity
    8·1 answer
  • To change state from gas to a liquid
    7·1 answer
  • Which of the following is an example of a chemical change?
    7·2 answers
  • Pls help i'll mark you the brainlest What force is needed to make ball fall on Earth if it has a mass of 13kg
    5·1 answer
  • A compound contains 36%. Of calcium and 64% of chlorine. Calculate its simplest
    5·1 answer
  • PLEASE HELP!!!!!!!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!