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Class 12 · Chemistry · Medium
→In the freezing-point depression method, 1.0 g of solute is dissolved in 100 g of solvent. If Kf = 2.0 K kg mol⁻¹ and ΔTf = 0.20 K, what is the molar mass of the solute?
Class 12 · Chemistry · Medium
→In the boiling-point elevation method, if the temperature difference is measured smaller than its actual value, how will the calculated molar mass generally compare with the actual value?
Class 12 · Chemistry · Medium
→A solution contains 2 g of solute in 1 L at 300 K and has an osmotic pressure of 0.6 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the approximate molar mass of the solute?
Class 12 · Chemistry · Medium
→If the pressure value in the osmotic-pressure method becomes double while all other quantities remain constant, what happens to the calculated molar mass?
Class 12 · Chemistry · Easy
→In the osmotic-pressure method, if the mass of solute is increased while all other quantities remain constant, how will the calculated molar mass change?
Class 12 · Chemistry · Medium
→Which mistake can make the result most incorrect in molar-mass determination by a colligative-property method?
Class 12 · Chemistry · Medium
→If the mass of an unknown solute is 2.4 g and the osmotic pressure method gives the amount of solute as 0.012 mol, what is its molar mass?
Class 12 · Chemistry · Medium
→If 1.5 g solute forms a 0.05 m solution in 300 g solvent, what is the molar mass of the solute?
Class 12 · Chemistry · Medium
→When 2 g solute is dissolved in 200 g water, the molality is 0.1 m. What is the molar mass?
Class 12 · Chemistry · Medium
→If a solute forms complete dimers, the observed molar mass from the colligative method will be how many times the true value?
Class 12 · Chemistry · Medium
→If solute AB completely dissociates into A⁺ and B⁻, the observed molar mass from the colligative method will be what fraction of the true value?
Class 12 · Chemistry · Easy
→In molar mass determination, if the solute is completely non-dissociated, what value of i is taken?
Class 12 · Chemistry · Medium
→If a 0.1 m non-dissociated solution has 0.3 kg solvent and 3.6 g solute, what is the molar mass?
Class 12 · Chemistry · Easy
→A 0.01 M solution has a volume of 500 mL and contains 0.9 g of solute. What is the molar mass of the solute?
Class 12 · Chemistry · Medium
→A solute forms 250 mL of a 0.02 M solution. If the mass of solute present is 1.0 g, what is the molar mass?
Class 12 · Chemistry · Medium
→A non-dissociated solute of mass 8 g is dissolved in 0.25 kg solvent and the molality is 0.4 m. What is the molar mass?
Class 12 · Chemistry · Medium
→If for a solution ΔT_b = 0.208 K, K_b = 0.52 K kg mol⁻¹, and the solvent mass is 0.25 kg, how many moles of solute are present?
Class 12 · Chemistry · Medium
→When 2 g of a solute is dissolved in 250 g of solvent, the boiling-point elevation is 0.052 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass?
Class 12 · Chemistry · Medium
→When 1 g of a non-dissociated solute is dissolved in 100 g of water, the freezing-point depression is 0.093 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass?
Class 12 · Chemistry · Easy
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