Chemistry Solutions

The osmotic pressure of a solution of NaCl is 0.10 atm and that of a glucose solution is 0.20 atm. The osmotic pressure of a solution formed by mixing 1 L of the sodium chloride solution with 2 L of the glucose solution is x * 10⁻³ atm. x is (nearest integer)

A 100 mL solution was made by adding 1.43 g of Na₂CO₃ · xH₂O. The normality of the solution is 0.1 N. The value of x is (The atomic mass of Na is 23 g/mol )

At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is 550 mm of Hg. At the same temperature, if one more mole of n-heptane is added to this solution, the vapour pressure of the solution increases by 10 mm of Hg. What is the vapour pressure in mmHg of n-heptane in its pure state ?

$100\mathrm{m}\mathrm{L}$ of $0.1\mathrm{M}\mathrm{H}\mathrm{C}\mathrm{l}$  is taken in a beaker and to it $100\mathrm{m}\mathrm{L}$ of $0.1\mathrm{M}\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$  is added in steps of $2\mathrm{m}\mathrm{L}$ and the $\mathrm{p}\mathrm{H}$ is continuously measured. Which of the following graphs correctly depicts the change in  $\mathrm{p}\mathrm{H}$ ?

The mole fraction of glucose (C?H?O?) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is

Henry's constant (in kbar) for four gases α, β, γ and δ in water at 298 K is given below: