Home
Class 12
CHEMISTRY
Find the molarity and molality of a 37% ...

Find the molarity and molality of a `37%` solution of HCI by weight . The density of the solution is 1 19 g/cc. and the molec lar mass of hydrochloric acid is 36. 5

Text Solution

Verified by Experts

The correct Answer is:
16.09 m, 12.06 M
Let mass of `37%` HCI solution = 100 g
`:.` Mass of HCI , `W_(B) = 37 g`
Mas of solvet, `W_(A) = 100 - 37`
`= 63 g = 0.063 kg `
Moles of HCI =`(37 G)/( 36.5 g mol^(-1))` = 1.014 mol
(Molar mass of HCI = 36 . 5g ` mol^(-1)` )
Molality `= ("Moles of HCI")/("Mass of solvent (kg)") = (1.014)/(0.063) ` mol `kg^(-1)`
`= 16.09 m `
Volume of solution
`= ("Mass of solution ")/( "Density of solution ") = (100 g)/( 1 . 19 g cm^(-3))`
`= 84 . 0 3 mL = 0.084 L`
Molarity `= ("Moles of solute")/("Volume of solution (L)")`
`= (1 . 014 mol)/( 0.084 L) = (1014)/(84) = mol L^(-1)`
= 12.07 M
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    BETTER CHOICE PUBLICATION|Exercise Numerical Problems (PSEB 2013)|5 Videos

  • SOLUTIONS

    BETTER CHOICE PUBLICATION|Exercise Numerical Problems (PSEB 2014)|2 Videos

  • SOLUTIONS

    BETTER CHOICE PUBLICATION|Exercise Numerical Problems (PSEB 2011)|13 Videos

  • POLYMERS

    BETTER CHOICE PUBLICATION|Exercise QUESTIONS |42 Videos

  • STRUCTURE OF ATOM

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS |6 Videos

Similar Questions

Explore conceptually related problems

Find the molarity and molality of a 14% solution of H_(2) SO_(4) by weight. The density of the solution is 1.10 g/cc and the molecular mass of sulphuric acid is 98

Find the molarity and molality of a 67% solution of HNO_(3) by weight . The density of the solution is 1.50 4 g/ cc and the molecular mass of nitric acid is 63

Find the molarity and molality of a 15% solution and H_(2)SO_(4) whose density is 1.02 g "cm"^(-3) .

Calculate the molality of 1L solution of 80% H_2SO_4 (w/V) given that the density of the solution is 1.80 g mL^-1 .

Density of 3M NaCl solution is 1.28g/cc. the molality of the solution is

A solution of glucose in water is labelled as 10 percent w/w . What would be the molality and mole fraction of each component in the solution? If the density of the solution is 1.2g mL^-1 , then what shall be the molarity of the solution?

Molarity and molality of a solution of an liquid (mol.mass =50 ) in aqueous solution is 9 and 10 respectively. what is the density of solution ?

The relation between molarity (M) and molality (m) is given by : (p=density of solution (g/mL), M_1 = molecular mass of solute)