A solution containing 8g of a substance in 100g


Asked by admin @ in Chemistry viewed by 274 People


A solution containing 8 g of a substance in 100 g of diethyl ether

boils at 36.86 °C whereas pure ether boils at 35.60°C. Determine
the molecular mass of the solute. (K, for ether = 2.02 K kg mol-ly

Answered by admin @



The molecular mass of the solute is 128 g/mol

Explanation:

Elevation in boiling point is given by:

\Delta T_b=i\times K_b\times m

\Delta T_b=T_b-T_b^0=(36.86-35.60)^0C=1.26^0C = Elevation in boiling point

i= vant hoff factor = 1 (for non electrolyte)

K_b =boiling point constant = 2.02K/kgmol

m= molality

\Delta T_b=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}

Weight of solvent (diethyl ether)= 100 g = 0.1 kg   (1kg=1000g)

Molar mass of unknown non electrolyte = M g/mol

Mass of unknown non electrolyte added = 8 g

1.26=1\times 2.02\times \frac{8g}{M g/mol\times 0.1kg}

M=128g/mol

Learn More:

Colligative properties

https://brainly.com/question/4227527

Elevation in boiling point as a colligative proprty

https://brainly.com/question/9614360


Similar Questions

1.0 m aqueous solutions of the following substances are prepared

Asked by admin @ in Chemistry viewed by 299 persons

Two saturated aqueous solutions are prepared at 25 ºC. One is made by dissolving lithium carbonate (Ksp = 8.15 x 10⁻⁴) in 100.0 mL of water until excess solid is …

A 5.25 solution of a substance is isotonic

Asked by admin @ in Chemistry viewed by 244 persons

A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol⁻¹) in the same solvent. If the densities of both the …

A solution of a substance x is used for whitewashing

Asked by admin @ in Science viewed by 275 persons

A solution of a substance X is used for whitewashing name the substance X and write its formula write the reaction of the substance X name in above with water …

Solution of a substance x is used for whitewashing

Asked by admin @ in Chemistry viewed by 266 persons

A solution of a substance ‘X’ is used for white washing. (i) Name the substance ‘X’ and write its formula. (ii) Write the reaction of the substance ‘X’ named in …

An aqueous solution containing 1g of urea boils at

Asked by admin @ in Chemistry viewed by 289 persons

An aqueous solution containing 1 gm of urea boils at 100.25ºC. The aqueous solution containing 3 g of glucose in the same volume will boil at (mol. wt. of urea …

A solution of substance x is used for whitewashing

Asked by admin @ in Science viewed by 296 persons

A solution of a substance X is used for whitewashing name the substance X and write its formula write the reaction of the substance X name in above with water …

Which product is a substance that is dissolved in solution

Asked by admin @ in Science viewed by 285 persons

The product formed when a substance dissolves in a liquid is known as​

What is the substance being dissolved in a solution called

Asked by admin @ in Science viewed by 246 persons

What is the substance that is being dissolved in a solution​

What is the substance that dissolves in a solution called

Asked by admin @ in Science viewed by 251 persons

A substance that dissolves another substance in a solution is called ? * 1 point A.solute B. solvent C.compound D. mixture

Choose the pair of substances that are most likely to form a homogeneous solution.

Asked by wiki @ in Chemistry viewed by 320 persons

a. c6h14 and c10h20 b. libr and c5h12 c. n2o4 and nh4cl d. c6h14 and h2o e. none of these pairs will form a homogeneous solution.

A solution containing 30g of non volatile solute

Asked by admin @ in Chemistry viewed by 274 persons

A solution containing 30g of non-volatile solute exactly in 90g of water has a vapour pressure of 2.8 kpa at 298 k. Furhter, 18 g of water is then added …

An aqueous solution containing 12.48 g of barium chloride

Asked by admin @ in Chemistry viewed by 314 persons

An aqueous solution containing 12.48g of barium chloride in 1.0 kg of water boils at 373.0832 K. calculate the degree of dissociation of barium chloride. (given, Kb for H2O=0.52 Kmolâ …

A substance that does not contain water of crystallization

Asked by admin @ in Chemistry viewed by 243 persons

A substance that does not contain water of crystallization A - Common salt B - Washing soda crystal ​

A substance that do not contain water of crystallization

Asked by admin @ in Chemistry viewed by 268 persons

A substance that does not contain water of crystallization A - Common salt B - Washing soda crystal ​

A solution of household bleach contains 5.25

Asked by maham237 @ in Chemistry viewed by 258 persons

sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make …

Most viewed questions in Chemistry


Discuss sn2 mechanism of methyl bromide using aqueous koh

Asked by admin @ in Chemistry viewed by 2161 persons


Comparing lactose percentage between whole milk and powdered milk

Asked by admin @ in Chemistry viewed by 1897 persons


Lewl letpa

Asked by maham237 @ in Chemistry viewed by 1521 persons



50 examples of unbalanced chemical equations with answers

Asked by admin @ in Chemistry viewed by 1361 persons


Chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

Asked by maham237 @ in Chemistry viewed by 1288 persons


Prepare a chart giving detailed information of carbon compounds

Asked by admin @ in Chemistry viewed by 1240 persons



Which 1 mole sample has the least entropy

Asked by maham237 @ in Chemistry viewed by 1233 persons


If you are given the assignment to cut raw poultry

Asked by maham237 @ in Chemistry viewed by 1223 persons


Effect of succinic acid on cst of phenol water system

Asked by admin @ in Chemistry viewed by 1217 persons



The reaction between aluminium powder and anhydrous barium nitrate

Asked by maham237 @ in Chemistry viewed by 1177 persons


Cnh4 lewis structure

Asked by maham237 @ in Chemistry viewed by 1113 persons


2 3 dihydroxypropanal

Asked by maham237 @ in Chemistry viewed by 1021 persons



Select true statements about the pentose phosphate pathway

Asked by maham237 @ in Chemistry viewed by 1006 persons


Crossword puzzle on carbon and its compounds class 10

Asked by admin @ in Chemistry viewed by 981 persons


Ionic bond calculator

Asked by maham237 @ in Chemistry viewed by 959 persons