Physics, 30.01.2020 12:04 GhostBoooty

Which of these solutions has the highest freezing point?

1.0 m molecular sucrose (c12h22o11)

1.0 m ionic sodium chloride (nacl)

1.0 m ionic calcium bromide (cabr2)

1.0 m ionic aluminum bromide (albr3)

1.0 m ionic potassium chloride (kcl)

Answers: 1

Show answers

Answers

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 one that would have the highest freezing point would be the sucrose (FIRST OPTION) since its vant hoff factor is 1. Hope this answers the question.

Answer from: brendacauani12345

Option (a) is the correct answer.

Explanation:

Depression in freezing point depends on Vant Hoff factor. So, more is the number of dissociated ions lesser will be the freezing point.

Mathematically, $\Delta T_{f} = iK_{f}m$

where $\Delta T_{f}$ = freezing point depression

i = Vant Hoff factor

$K_{f}$ = freezing point depression

m = molality of the solution

The ratio between concentration of particles that are actually produced when a substance is dissolved and the concentration of a substance calculated from its mass is known as Vant Hoff factor.

Mathematically, i = $\frac{\text{total no. of moles of particles after association/dissociation}}{\text{No. of moles of particles before association/dissociation}}$

For dissociation i is greater than or equal to 1. 1 then dissociation has taken place. When i = 1 then neither association or dissociation has taken place.

Hence, sucrose will have i = 1 as it produces only one ion.

Sodium chloride will have i = 2 as it produces two ions.

Calcium bromide will have i = 3 as it produces three ions.

Aluminium bromide will have i = 4 as it produces four ions.

Potassium chloride will have i = 2 as it produces two ions.

Therefore, we can conclude that sucrose solution will have highest freezing point.

Answer from: Quest

this could be newton#'s law of cooling. the cooling curve is exponential

Answer from: Quest

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.

Another question on Physics

Physics, 21.06.2019 12:40

In guinea pigs, assume black coat is completely dominant over white. to determine whether an unknown black guinea pig is pure or hybrid black, it should be crossed with bb, bb, bb

Answers: 2

Answer

Physics, 21.06.2019 21:00

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Answers: 2

Answer

Physics, 22.06.2019 06:30

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Answers: 2

Answer

Physics, 22.06.2019 11:00

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Answers: 1

Answer

You know the right answer?

Which of these solutions has the highest freezing point?

1.0 m molecular sucrose (c12h2...