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Class 12 · Chemistry · Medium
→The true molar mass of an AB₃ salt is 160 g mol⁻¹. If 25% dissociation occurs, what is its apparent molar mass?
Class 12 · Chemistry · Medium
→If the apparent molar mass of a solute is 1.25 times its true molar mass, what is the van’t Hoff factor and what does it indicate?
Class 12 · Chemistry · Medium
→An AX₃ salt is 20% dissociated. From 250 initial formula units, how many effective particles will be present?
Class 12 · Chemistry · Easy
→A solution has van't Hoff factor i = 1.05. Which explanation is most appropriate?
Class 12 · Chemistry · Medium
→In a 0.40 mol kg⁻¹ solution, Kb = 0.50 K kg mol⁻¹ and the observed boiling-point elevation is 0.30 K. If the solute dissociates into two ions, what is the degree of dissociation?
Class 12 · Chemistry · Easy
→An unknown solute has i = 5. Which cause is most suitable?
Class 12 · Chemistry · Medium
→A solute forms dimers and has i = 0.64. What is the degree of dimer association?
Class 12 · Chemistry · Medium
→For an AB electrolyte, 100 initial units produce 130 effective particles. What is the degree of dissociation?
Class 12 · Chemistry · Easy
→The apparent molar mass of a solute is 96 g mol−1. If i = 1.25, what is the true molar mass?
Class 12 · Chemistry · Easy
→Assume 80% dissociation of AlCl₃. What is the value of i?
Class 12 · Chemistry · Medium
→The normal boiling-point elevation for a solute is 0.32 K. What is the observed elevation if 50% trimer association occurs?
Class 12 · Chemistry · Medium
→If the van’t Hoff factor of BaCl₂ is 2.5, what is the degree of dissociation?
Class 12 · Chemistry · Hard
→Ten percent of a solute forms dimers, 30% forms trimers, and 20% forms tetramers; the rest remains single. What is i?
Class 12 · Chemistry · Easy
→A solution has i = 0.48. Which statement is most correct?
Class 12 · Chemistry · Easy
→For a solute, i = 5/4. If it dissociates into two ions, what is the degree of dissociation?
Class 12 · Chemistry · Easy
→For a 0.12 m solution, the normal freezing-point depression is 0.24 K and the observed depression is 0.60 K. What is i?
Class 12 · Chemistry · Medium
→The elevation in boiling point is 40% lower than the expected value. What is the apparent molar mass compared with the true mass?
Class 12 · Chemistry · Easy
→An AB₄ electrolyte is 25% dissociated. What is the value of i?
Class 12 · Chemistry · Medium
→A colligative property is 0.55 times its normal value. If the solute forms only dimers, what is the degree of association?
Class 12 · Chemistry · Medium
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