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 H2SO4…

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…

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 dm^3.

The molality of a 0.8 M H2SO4 solution with density 1.06 g/cm^3 is:

The mass of sodium acetate ( CH3 COONa) required to prepare 250 mL of 0.35 M aqueous solution is (in grams). (Molar mass of CH3 COONa is…

If a substance ‘A’ dissolves in a solution of a mixture of ‘B’ and ‘C’ with their respective number of moles as na, nb, and nc, 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 molar 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…

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 = 10^-2 M. (Nearest integer) Given:…

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) (1) 5.0 mL…

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 the…

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.…