Calculate the mass of compound (molar mass = 256 g mol^-1) to be dissolved in 75 of benzene to lower its freezing point by 0.48 K (K_f= 5.12 kg mol^-1)

Solution

We have given:

T_f = 0.48 K
K_f=5.12K kg mol^-1

W₁ = 75 g

W₂ = ?

M₂ = 256 g mol^-1
$increment straight T subscript straight f space equals space fraction numerator straight K subscript straight f space straight x space straight w subscript 2 space straight x space 1000 over denominator straight M subscript 2 space straight x space straight w subscript 1 end fraction space straight w subscript 2 space equals fraction numerator increment straight T subscript straight f space straight x space straight M subscript 2 space xw subscript 1 over denominator straight K subscript straight f space straight x space 1000 end fraction equals space fraction numerator 0.48 space straight x space 256 space straight x space 75 over denominator 5.12 space straight x space 1000 end fraction space equals space 18 space straight g space$

Some More Questions From Solutions Chapter

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

Amongst the following compunds identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform, (vi) pentanol.

For Daily Free Study Material Join wiredfaculty

Solutions

Calculate the mass of compound (molar mass = 256 g mol^-1) to be dissolved in 75 of benzene to lower its freezing point by 0.48 K (K_f= 5.12 kg mol^-1)

Some More Questions From Solutions Chapter

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

Amongst the following compunds identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform, (vi) pentanol.

Two liquids A and B boils at 145⁰C and 190⁰C respectively. Which of them has a higher vapour pressure at 80⁰C ?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Loaction

For Daily Free Study Material Join wiredfaculty

Solutions

Calculate the mass of compound (molar mass = 256 g mol-1) to be dissolved in 75 of benzene to lower its freezing point by 0.48 K (Kf= 5.12 kg mol-1 )

Some More Questions From Solutions Chapter

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 370C.

Suppose a solid solution is formed between two substances, one whose particles are very large and the other whose particles are very small. What kind of solid solution is this likely to be?

Amongst the following compunds identify which are insoluble, partially soluble and highly soluble in water?(i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform, (vi) pentanol.

Two liquids A and B boils at 1450C and 1900C respectively. Which of them has a higher vapour pressure at 800C ?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Calculate the mass of compound (molar mass = 256 g mol^-1) to be dissolved in 75 of benzene to lower its freezing point by 0.48 K (K_f= 5.12 kg mol^-1)

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL at 37⁰C.

Amongst the following compunds identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform, (vi) pentanol.

Two liquids A and B boils at 145⁰C and 190⁰C respectively. Which of them has a higher vapour pressure at 80⁰C ?