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Calculate the amount of KCl which must b...

Calculate the amount of KCl which must be added to 1 kg of water so that its freezing point is depressed by 2 K.

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What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing point of water by 7.50^@C ? The freezing point depression constant (k_f) for water is 1.86^@C/m . Assume that Van't Hoff factor for NaCl is 1.87. (Molar mass of NaCl =58.5g).

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What mass of NaCl (molar mass= 58.5 g mol^-1 ) must be dissolved in 65.0 g of water to lower the freezing point by 7.50 ^@C ? The freezing point depression constant, K_f , for water is 1.86 K kg mol^-1 . Assume Van's Hoff factor for NaCl is 1.87.

MODERN PUBLICATION-SOLUTIONS -EXERCISE
  1. Calculate the molality of NaCl solution whose elevtaion in boiling poi...

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  2. 0.01 m aqueous solution of sodium sulphate depresses the freezing poin...

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  3. Calculate the amount of KCl which must be added to 1 kg of water so th...

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  4. An aqueous solution containing 4.9 g of a solute dissolved in 500 mL o...

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  5. A 0.1539 molal aqueous solution of cane sugar (molar mass-342gmol^-1) ...

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  6. Calculate the freezing point of an aqueous solution containing 10.50 g...

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  7. Do molality and mole fraction changes with temperature ?

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  8. True or false The solubilities of all ionic substances increase with i...

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  9. True or false The depression in freezing point for 1 m solution of a s...

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  10. True or false If observed value of the colligative property is more th...

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  11. True or false Van't Hoff factor, i<1 if there is association of the so...

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  12. True or false The freezing point of 0.1 m soluton of acetic acid in be...

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  13. True or false Lowering in vapour pressure is a colligative property.

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  14. True or false Two liquids A and B boil at 125^@C and 146^@C respective...

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  15. True or false Elevation in boiling point of 0.1 m NaCl solution will b...

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  16. True or false Solution of ethanol and cyclohexane shows positive deriv...

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  17. True or false Colligative properties depend only upon the moles of sol...

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  18. True or false The more concentrated solution is said to be hypertonic ...

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  19. Define azeotropes. What type of azeotrope is formed by positive deviat...

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  20. True or false For solution showing positive deviation form Raoult's la...

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