Question

Define (i) Mass by volume percentage (ii) Molality (iii) Molarity (iv) Normality

Answer 1

1.nass by volume :- mass of solute is dissolved in 100 ml of solution.
mass by volume % :- weight of solute ×100/volume of solution.
2..molality:- it is defined as number of moles of solute per kg weight of solvent. It remains independent from temperature.
3. molarity:- moles of solute dissolved in per litre of solution.
4 . normality :-number gram equivalents of solute per litre volume of solution.

Answer 2

Hey !!

MASS BY VOLUME PERCENTAGE

(w/V) is the mass of solute dissolved in 100 mL of the solution.

              (w/V) = WB × 100 / V (mL)

MOLALITY

It is defned as the number of moles of solute per kilogram of the solvent.

 Molality = Number of moles of solute × 1000 / Mass of solvent

MOLARITY

It is defined as the number of moles of solute dissolved in one litre or more cubic decimetre of the solution.

Molarity = Mass of moles of solute × 1000 / Volume of the solution

NORMALITY

It is the number of gram equivalents of the solute dissolved in one litre of the solution.

Normality = Number of gram equivalents of solute × 1000 / Volume of solution (mL)

NOTE :- { Gram equivalents of solute = W₂ / Equivalent weight }

HOPE IT HELPS YOU !!