Search questions
Use text search or combine filters to find exactly the questions you need.
Class 12 · Chemistry
→FeCl₃ is 60% dissociated. If its observed molar mass is 81.25 g mol⁻¹, what is its true molar mass?
Class 12 · Chemistry
→An electrolyte of the type A₂B₃ has a van’t Hoff factor (i) of 3.4. On complete dissociation, one formula unit produces five particles. What is the degree of dissociation of the electrolyte?
Class 12 · Chemistry
→When 1.8 g of a solute is dissolved in 150 g of water, the depression in freezing point is 0.279 K. If i = 0.75, what is the true molar mass?
Class 12 · Chemistry
→When 2.4 g of a solute is dissolved in 200 g of solvent, the elevation in boiling point is 0.156 K. If Kb = 0.52 K kg mol⁻¹ and i = 1.5, what is the true molar mass?
Class 12 · Chemistry
→If the observed molar mass of a solute is 1.6 times the true molar mass, what is the van’t Hoff factor and the probable behaviour of the solute?
Class 12 · Chemistry
→If the observed molar mass of a solute is 0.4 times the true molar mass, what is the van’t Hoff factor and the probable behaviour of the solute?
Class 12 · Chemistry
→A 500 mL solution is prepared using 2 g of solute. At 300 K, its osmotic pressure is 0.615 atm. If i = 1.25, what is the true molar mass?
Class 12 · Chemistry
→When 3.6 g of an AB solute is dissolved in 300 g of water, the depression in freezing point is 0.558 K. If the degree of dissociation is 25%, what is the true molar mass?
Class 12 · Chemistry
→3 g of a non-volatile solute is dissolved in 72 g of water. The relative lowering of vapour pressure is 0.04. What is the approximate molar mass of the solute?
Class 12 · Chemistry
→The observed molar mass of an A₂B-type solute is 1/2.4 of its true molar mass. What is the degree of dissociation?
Class 12 · Chemistry
→An AB-type solute is 60% dissociated. If its observed molar mass is 75 g mol⁻¹, what is its true molar mass?
Class 12 · Chemistry
→A substance forms trimers to the extent of 45%. If its true molar mass is 210 g mol⁻¹, what will be the approximate observed molar mass?
Class 12 · Chemistry
→A substance undergoes 60% dimerization. If its observed molar mass is 200 g mol⁻¹, what is its true molar mass?
Class 12 · Chemistry
→A solution has an actual molarity of 0.03 M and a van’t Hoff factor of 1.8. If the true molar mass of the solute is 180 g mol⁻¹, what observed molar mass would be obtained by a colligative-property method?
Class 12 · Chemistry
→When 4.8 g of a solute is dissolved in 400 g of solvent, the elevation in boiling point is 0.156 K. If Kb = 0.52 K kg mol⁻¹ and i = 0.75, what is the true molar mass?
Class 12 · Chemistry
→When 2.5 g of a solute is dissolved in 500 g of water, the depression in freezing point is 0.2325 K. If the van’t Hoff factor is 1.25, what is the true molar mass?
Class 12 · Chemistry
→A student mistakenly uses 0.125 g instead of 125 g for the solvent mass in a freezing-point method. How will the calculated molar mass compare with the correct value?
Class 12 · Chemistry
→A 0.04 M solution has an osmotic pressure of 1.476 atm at 300 K. If the true molar mass is 150 g mol⁻¹, what will be the observed molar mass?
Class 12 · Chemistry
→An AB₃-type solute is 40% dissociated. If its observed molar mass is 62.5 g mol⁻¹, what is its true molar mass?
Class 12 · Chemistry
→