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Can you please eshtablish a relation between Normality and Formality?

Can you please eshtablish a relation between Normality and Formality?

Grade:10

3 Answers

Aarti Gupta
askIITians Faculty 300 Points
9 years ago
Normality(N) – It is the number of gram equivalents of the solute present in 1000 ml or 1L of the solution.It is expressed as-
N = G-equivalents of solute/ volume of solution (L)
= Mass of solute/ GEM(solute) * vol.of sol.(L)
where, GEM is the gram equivalent mass which is the quantity of substance whose mass in grams is equal to its equivalent mass.For ex- equivalent mass of oxygen is 8 so its GEM will be 8g.
Formality(F) – It is the number of gram formula mass of solute dissolved per litre of solution.It is expressed as -
F = Number of gram formula mass of solute / volume of solution in litres
Formality,like molarity expresses concentration as moles of solute per litre of solution.Molarity is the concentration of particular species in solution, while formality is substance’s total concentration in solution without regard to its specific chemical form.If the substance dissolves without dissociating in ions,then there will be no difference between molarity and formality.Nowdays molarity is used in place of formality.
And the relation between molarity and normality is given as-
Molarity * Molecular mass(solute)= Normality * Equivalent mass(solute)
Suraj Prasad IIT Patna
askIITians Faculty 286 Points
9 years ago
Formality Normality
Formality is the number of formula weights of solute per liter of solution. In case of ionic compounds, like NaCl, Na2CO3, in place of molarity, formality is used. Normality is the number of gram equivalents of solute per litre of the solution.
It is represented by symbol F. It is represented by symbol N.
F =Number of gram formula masses of solute/(Volume of solution in litre) N= Strength in grams per litre/ (Equivalent mass of solute)
Saurabh Kumar
askIITians Faculty 2400 Points
9 years ago
Formality
Formality is the number of formula weights of solute per liter of solution.
In case of ionic compounds, like NaCl, Na2CO3, in place of molarity, formality is used.
Normality
Normality is the number of gram equivalents of solute per litre of the solution.
It is represented by symbol F. It is represented by symbol N.
F =Number of gram formula masses of solute/(Volume of solution in litre) N= Strength in grams per litre/ (Equivalent mass of solute)

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