Concentration Terms (Molarity, Molality, etc.): JEE Questions & Solutions

At T K, 100 g of 98% H₂SO₄ (w/w) aqueous solution is mixed with 100 g of 49% H₂SO₄ (w/w) aqueous solution. What is the mole fraction of…

Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is:

20 mL of 2 M NaOH solution is added to 400 mL of 0.5 M NaOH solution. The final concentration of the solution is x 10⁻² M. (Nearest integer)

Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is: Given: Density…

Assume a living cell with 0.9% (w/w) of glucose solution (aqueous). This cell is immersed in another solution having equal mole fraction of…

Sea water, which can be considered as a 6 M solution of NaCl, has a density of 2 g mL⁻¹. The concentration of dissolved oxygen (O₂) in sea…

The quantity which changes with temperature is:

Volume of 3 M NaOH (formula weight 40 g/mol) which can be prepared from 84 g of NaOH is x × 10⁻¹ dm³.

The molality of a 0.8 M H₂SO₄ solution with density 1.06 g/cm³ is × 10⁻³ m.

The mass of sodium acetate (CH₃COONa) required to prepare 250 mL of 0.35 M aqueous solution is (in grams). (Molar mass of CH₃COONa is 82.02…

If a substance ‘A’ dissolves in a solution of a mixture of ‘B’ and ‘C’ with their respective number of moles as nₐ, n_b, and n_c, the mole…

The number of units, which are used to express concentration of solutions from the following is: Mass percent, Mole, Mole fraction,…

What is the mass ratio of ethylene glycol (C₂H₆O₂, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250…

Some amount of dichloromethane (CH₂Cl₂) is added to 671.141 mL of chloroform (CHCl₃) to prepare a 2.6 × 10⁻³ M solution of CH₂Cl₂ (DCM).…

The density of 3 M solution of NaCl is 1.0 g mL⁻¹. Molality of the solution is × 10⁻² m. (Nearest integer) Given: Molar mass of Na and Cl…

The molality of a 10% (v/v) solution of di-bromine solution in CCl4 (carbon tetrachloride) is 'x'. x = \times 10^{-2} \, \text{M}. (Nearest…

The volume of 0.02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous Ba(OH)₂ is (Assume complete neutralization)

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: 3.1500 g of hydrated…

A solution of sugar is obtained by mixing 200 g of its 25% solution and 500 g of its 40% solution (both by mass). The mass percentage of…

A solution is prepared by adding 2 g of "X" to 1 mole of water. Mass percent of "X" in the solution is.

An analyst wants to convert 1 L HCl of pH = 1 to a solution of HCl of pH = 2. The volume of water needed to do this dilution is mL.…