Question

18 g of glucose, C₆H₁₂O₆ (Molar Mass = 180 g mol^-1) is dissolved in 1 kg of water in a saucepan. At what temperature will this solution boil?

(K_b for water = 0.52 K kg mol^-1, boiling point of pure water = 373.15 K)

Solution

w₁ = weight of solvent (H₂O) = 1 kg

w₂ = weight of solute (C₆H₁₂O₆) = 18 gm

M₂ = Molar mass of solute (C₆ H₁₂O₆) = 180 g mol^-1

K_b = 0.52 K Kg mol^-1

^{$straight T subscript straight b superscript 0 space equals 373.15 straight K increment straight T subscript straight b space equals fraction numerator straight K subscript straight b space straight x space 1000 space straight x space straight w subscript 2 over denominator straight M subscript 2 space straight x space straight w subscript 1 end fraction space equals space fraction numerator 0.52 space straight x space 1000 space straight x space 18 over denominator 180 space straight x space 1000 end fraction equals 0.052 straight K Therefore comma increment straight T subscript straight b equals space straight T subscript straight b minus space straight T subscript straight b superscript 0 space 0.052 space straight K space equals space straight T subscript straight b minus 373.15 straight T subscript straight b equals 373.202 space straight K$}

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Solutions

18 g of glucose, C₆H₁₂O₆ (Molar Mass = 180 g mol^-1) is dissolved in 1 kg of water in a saucepan. At what temperature will this solution boil?

(K_b for water = 0.52 K kg mol^-1, boiling point of pure water = 373.15 K)

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 ?

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18 g of glucose, C6H12O6 (Molar Mass = 180 g mol-1) is dissolved in 1 kg of water in a saucepan. At what temperature will this solution boil? (Kb for water = 0.52 K kg mol-1, boiling point of pure water = 373.15 K)

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.

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Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

18 g of glucose, C₆H₁₂O₆ (Molar Mass = 180 g mol^-1) is dissolved in 1 kg of water in a saucepan. At what temperature will this solution boil?

(K_b for water = 0.52 K kg mol^-1, boiling point of pure water = 373.15 K)

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 ?