Interpretation The reasons why methanol and ethanol are soluble in water whereas octanol is poorly soluble have to be determined.
Concept introduction:
‘Like dissolves like’ principle said that polar compounds including ionic compound should be more soluble in polar solvent. Likewise, non-polar compound should be more soluble in non-polar solvent. Other hand, compounds with similar intermolecular force capability to soluble in one another because solute-solvent interactions are similar signification to the solute-solute interaction.
‘ The set of repulsive and attractive force between molecules that result from the polarity between neighboring molecules is represented as intermolecular force. There are four types of intermolecular forces:
- Hydrogen bonding
- London dispersion force
- Ion – dipole force
- Dipole – Dipole force
Hydrogen bond: Hydrogen is bonded to strong electronegative atom like oxygen, nitrogen etc.
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Chapter 13 Solutions
Chemistry & Chemical Reactivity
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- Ethylene glycol, CH2OHCH2OH is a liquid at room temperature and dissolves into water in all proportions. However, butane, C4H10, is a gas at room temperature and is insoluble in water. How do you account for these differences?arrow_forward24.9 g of an unknown molecular solute is dissolved in 5.01 moles of 1,2-ethanediol (C2H6O2), causing the freezing point of 1,2-ethanediol to decrease by 3.32 °C. Calculate the molar mass of the solute. For 1,2-ethanediol, the molar mass is 62.07 g/mol and Kf = 3.11 °C/m.arrow_forwardA sample of 2.05 g of polystyrene of uniform polymer chainlength was dissolved in enough toluene to form 0.100 L of solution.The osmotic pressure of this solution was found to be 1.21kPa at 25 °C. Calculate the molar mass of the polystyrene.arrow_forward
- The average osmotic pressure of blood is 7.7 atm at 25 °C. What molarity of glucose 1C6H12O62 will be isotonic with blood?arrow_forward5. (a) The melting point of ammonia (NH3) is higher than that of methane (CH4) and yet these molecules have comparable molecular mass. Why does NH3 have a higher melting point than CH4? Explain in terms of intermolecular forces. (b) Predict the solubility of HF, HCl and Cl2 in water and explain your answer.arrow_forwardA polymer sample of 4.1 g was dissolved in enough dichloromethane to form 0.100 L of solution. The osmotic pressure of this solution was found to be 1.21 kPa at 25°C. Calculate the molar mass of the polymer. Hint: Take "i "as 1.arrow_forward
-  Small alcohols like ethanol are completely miscible in water or water-based solvents. Long chain alcohols like decanol are nearly insoluble in water. Why do you think this happens?arrow_forwardThe freezing point of CCl4 was lowered by 0.52 K when 50 grams of a chemical were added to the solvent. Calculate the compound's molar mass. Kf of tetrachloromethane are equal to 30 kilograms per mole.arrow_forwardWhat is the mole fraction of sucrose when 433 g sucrose C12H22011 (molar mass 342.3 g/mol) is dissolved in 655 g water? 0.0336 0.101 0.0456 1.03 O 1.75arrow_forward
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