All categories

3 years ago

According to Raoult's law, which statement is false?

Chemistry

1 answer:

irina1246 [14]3 years ago

4 0

Answer:

The answer is (A) Ionic solutes dissociate in solution causing an enhancement of all colligative properties.

Explanation:

When a solute dissociates in solution, it causes changes in colligative properties. In several properties an increase is produced (like in boiling point) whereas in others a decrease is produced (like in melting point and vapor pressure). Colligative properties are these that depend of the number of solute particles there are in a solution. Raoult's law is about vapor pressure of a solvent, and it says that the vapor pressure of a solvent decreases when a solute is added. As greater the number of solute particles in solution, lesser the vapor pressure of the solvent. That is due to the fact that solute particles interact with solvent molecules and avoid its escape to gas phase. So, there are less solute particles in gas phase and consequently its vapor pressure is less.

You might be interested in

Which compound will have the larger rf value on a si02 tlc plate using 10 % ethyl acetate/ hexane as eluent: 3-decanone or 3-dec

Hatshy [7]

The formula of determining the $R_f$ value is:

$R_f = \frac{distance travelled by the solute}{distance travelled by the solvent}$

where both the distance are measured from the common origin.

10 % ethyl acetate/ hexane means it has 10 % ethyl acetate and 90 % hexane which are non-polar in nature. Hence, the non-polar compound will travel farther in the TLC plate along with the eluent and the polar compound will travel less as they remain attracted to the polar adsorbent $SiO_2$ .

Among 3-decanone and 3-decanol, 3-decanone will have high $R_f$ as it is non-polar.

Among toluene and benzoic acid, toluene will have high $R_f$ as it is non-polar.

Among cyclooctane and cyclooctanone, cyclooctane will have high $R_f$ as it is non-polar.

7 0

4 years ago

A kilogram is an SI unit. Which quantity might you measure in kilograms? temperature

jonny [76]

The quantity that you would measure in kg, is mass.

4 0

3 years ago

Read 2 more answers

Complete the following equations

hoa [83]

The answer is NaCl

-Hope this helps

5 0

3 years ago

Ultimately the carbon molecules in pyruvate end up as what molecules

jeyben [28]

CO2 Thats your answer

3 0

3 years ago

Please help with chemistry question... It would help me tremendously and if you can, please show work :)?

Alexxandr [17]

Answer:

5.06 atm

Explanation:

Step 1:

Data obtained from the question. This includes:

Mass of S2O = 175g

Volume (V) = 16600 mL

Temperature (T) = 195°C

Pressure (P)

Step 2:

Determination of the number of mole of S2O in 175g of S2O.

Mass of S2O = 175g

Molar Mass of S2O = (32x2) + 16 = 64 + 16 = 80g/mol

Number of mole of S2O =.?

Number of mole = Mass/Molar Mass

Number of mole of S2O = 175/80

Number of mole of S2O = 2.1875 moles

Step 3:

Conversion to appropriate units.

It is essential to always express the various variables in the right units of measurement in order to obtain the desired answer in the right units.

For volume:

1000mL = 1L

Therefore, 16600mL = 16600/1000 = 16.6L

For temperature:

Temperature (Kelvin) = temperature (celsius) + 273

Temperature (celsius) = 195°C

Temperature (Kelvin) = 195°C + 273 = 468K

Step 4:

Determination of the pressure.

The pressure can be obtained by the application of the ideal gas equation. This is illustrated below:

Volume (V) = 16.6L

Temperature (T) = 468K

Number of mole (n) = 2.1875 moles

Gas constant (R) = 0.082atm.L/Kmol

Pressure (P) =

PV = nRT

P x 16.6 = 2.1875 x 0.082 x 468

Divide both side by 16.6

P = (2.1875 x 0.082 x 468) /16.6

P = 5.06 atm

Therefore, the pressure is 5.06 atm

6 0

3 years ago