Solutions questions
1397 published questions with worked solutions.
- After adding non-volatile solute freezing point of water decreases to -0.186^ C . Calculate T_b, if K_f = 1.86 K ,kg ,mol^ -1 and...
- Dissolution of 1.5 g of a non-volatile solute (mol. wt. = 60) in 250 g of a solvent reduces its freezing point by 0.01^ C . Find...
- 20 g of a binary electrolyte (mol. wt. = 100) are dissolved in 500 g of water. The depression in freezing point of the solution...
- Addition of a non-volatile solute causes lowering in vapour pressure of a solvent from 0.8 atm to 0.2 atm. What is the mole...
- If at certain temperature, the vapour pressure of pure water is 25 mmHg and that of a very dilute aqueous urea solution is 24.5...
- The average osmotic pressure of human blood is 7.8 bar at 37^ C . What is the concentration of an aqueous NaCl solution that...
- 1 mole each of the following solutes are taken in 5 moles of water, A. NaCl B. K_2SO_4 C. Na_3PO_4 D. glucose Assuming 100%...
- The boiling point of 0.2 mol kg^ -1 solution of X in water is greater than equimolal solution of Y in water. Which one of the...
- Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is
- In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionisation is 0.3. Taking K_f for water as 1.85, the freezing...
- By dissolving 5 g substance in 50 g of water, the decrease in freezing point is 1.2^ C . The gram molal depression is 1.85^ C ....
- The vapour pressure of pure liquid is 1.2 atm. When a non-volatile substance B is mixed in A, then its vapour pressure becomes...
- How much C_2H_5OH must be added to 1.0 L of H_2O . So that solution should not freeze at -4^ F ? [K_f( C_2H_5OH ) = 1.86^ C/m ]
- If sodium sulphate is considered to be completely dissociated into cation and anion in aqueous solution, the change in freezing...
- The vapour pressure of water at 20^ C is 17.5 mmHg. If 18 g of glucose ( C_6H_ 12 O_6 ) is added to 178.2 g of water at 20^ C ,...
- An aqueous solution of 2% (wt/wt) non-volatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is...
- On mixing heptane and octane, form an ideal solution at 373 K, the vapour pressures of the two liquid components (heptane and...
- Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to...
- A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of solute...
- Which of the following aqueous solutions produce the same osmotic pressure? (i) 0.1 M NaCl solution (ii) 0.1 M glucose solution...
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