Concentration units and Henry's law

36 questions on Concentration units and Henry's law from the Solutions and Colligative Properties chapter: 8 NEET level, 14 JEE Main, 14 JEE Advanced. Each one opens with its answer and solution.

• Which of the following concentration terms does NOT change with temperature? NEET level
• A solution is made by dissolving 1 mol of glucose in 9 mol of water. The mole fraction of glucose is NEET level
• Gas X and gas Y have Henry's law constants K_H = 2 kbar and 40 kbar respectively in water at 298 K (law written as p = K_H x). At the same partial pressure and ... NEET level
• The molality of a solution containing 4 g of NaOH (molar mass 40 g mol^-1) in 250 g of water is NEET level
• Concentrated nitric acid is 70% HNO3 by mass and has density 1.41 g mL^-1. Taking the molar mass of HNO3 as 63 g mol^-1, calculate its molarity in mol L^-1 (ans... JEE Main level
• A 2.00 M aqueous solution of urea (molar mass 60 g mol^-1) has density 1.03 g mL^-1. Its molality is closest to JEE Main level
• At a certain temperature the Henry's law constant of a gas in water is K_H = 8.5x 10^4 bar (with p = K_H x, x the mole fraction of the gas in solution). Calcula... JEE Main level
• Which of the following statements about Henry's law are correct? JEE Main level
• 100 mL of 0.20 M NaCl solution is mixed with 300 mL of 0.40 M NaCl solution (volumes assumed additive). The molarity of the final solution is JEE Main level
• A 250 kg sample of a dilute aqueous solution of an industrial effluent contains 0.45 g of fluoride ion. Express the concentration in parts per million by mass (... JEE Main level
• An aqueous ethanol solution contains 46% ethanol by mass (molar masses: ethanol 46, water 18 g mol^-1). The mole fraction of ethanol is JEE Main level
• Air (taken as 21% O2 by mole) at a total pressure of 5.0 bar is in equilibrium with water at a temperature where K_H(O2) = 4.5x10^4 bar (law p = K_H x). Treat w... JEE Advanced level
• A 4.00 m aqueous solution of glucose (molar mass 180 g mol^-1) has density 1.20 g mL^-1. Calculate its molarity in mol L^-1 to two decimal places. JEE Advanced level
• A bottle holds 330 g of water saturated with CO2 at 4.0 bar (sealed). For CO2 in water, K_H = 1670 bar (law p = K_H x). After opening, the water equilibrates wi... JEE Advanced level
• A 2.00 M aqueous urea solution (molar mass 60 g mol^-1) has density 1.03 g mL^-1 (M of water =18). Which of the following statements are correct? JEE Advanced level
• Gases A and B dissolve in water at 298 K with K_H(A) = 2.0x10^4 bar and K_H(B) = 8.0x10^4 bar (law p = K_H x). A gas mixture with partial pressures p_A = 1.0 ba... JEE Advanced level
• A gas dissolves in 500 g of water to give a solution containing 0.0150 mol of the gas. For this gas K_H = 3000 bar with p = K_H x (x is the mole fraction in sol... JEE Advanced level
• A solution of a solute (molar mass M_2, in g mol^-1) has molarity C (mol L^-1) and density d (g mL^-1). The correct expression for its molality m is JEE Advanced level
• Which of the following concentration terms does NOT change with temperature? NEET level
• A solution is prepared by dissolving 18 g of glucose (molar mass 180 g mol^-1) in 90 g of water (molar mass 18 g mol^-1). The mole fraction of glucose is closes... NEET level
• The Henry's law constants K_H (in kbar) of four gases in water at 298 K are: N2 76.5, O2 34.9, He 145.0, CO2 1.67. At equal partial pressure, which gas has the ... NEET level
• The molarity of a solution containing 4.0 g of NaOH (molar mass 40 g mol^-1) in 500 mL of solution is NEET level
• A 18% (w/w) aqueous glucose solution (molar mass 180 g mol^-1) has a molality of JEE Main level
• A 3.0 M aqueous urea solution (molar mass 60 g mol^-1) has density 1.12 g mL^-1. Its molality is closest to JEE Main level
• Air containing 80% nitrogen by mole is in contact with water at a total pressure of 5.0 atm. Take K_H for N2 in water as 8.0x10^4 atm (for p=K_Hx) and ignore wa... JEE Main level
• 200 mL of 0.50 M NaCl is mixed with 300 mL of 0.20 M NaCl (volumes additive). The molarity of the final solution is JEE Main level
• The solubility of O2 in water at 298 K is 1.3x10^-3 mol L^-1 atm^-1 (concentration =k_H p). Air contains 21% O2 by volume at 1.0 atm. Find the mass of O2 (molar... JEE Main level
• In an aqueous ethanol solution the mole fraction of ethanol is 0.10. Taking the molar mass of water as 18 g mol^-1, calculate the molality of ethanol. Give the ... JEE Main level
• Which of the following concentration terms are independent of temperature? (Assume no chemical change.) JEE Main level
• A 2.5 M aqueous NaOH solution has density 1.10 g mL^-1 (molar masses: NaOH 40, water 18 g mol^-1). The mole fraction of NaOH in the solution is closest to JEE Advanced level
• A gas mixture exerts partial pressures of 0.60 bar of gas A and 0.40 bar of gas B over water at a fixed temperature. The Henry's law constants (for p=K_Hx) are ... JEE Advanced level
• Dry air contains 78% N2 by mole. Air saturated with water vapour (vapour pressure 0.040 atm at the temperature) is in equilibrium with water at a total pressure... JEE Advanced level
• Concentrated sulphuric acid is 98% w/w H2SO4 (molar mass 98 g mol^-1) with density 1.84 g mL^-1. What volume of it (in mL, one decimal place) is needed to prepa... JEE Advanced level
• The following solutions are mixed (volumes additive): 150 mL of 0.20 M NaCl, 250 mL of 0.10 M CaCl2 and 100 mL of 0.30 M AlCl3. Assuming complete dissociation, ... JEE Advanced level
• At a fixed temperature the Henry's law constants (for p=K_Hx) of gases X and Y in water are K_X=4.0x10^4 bar and K_Y=1.6x10^5 bar. Which statements are correct? JEE Advanced level
• A 2.00 m aqueous solution of urea (molar mass 60 g mol^-1) has density 1.03 g mL^-1 (water 18 g mol^-1). Which statements are correct? JEE Advanced level