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  • What is the normality of 0.5 M phosphoric acid?Option: 1 1.0Option: 2 <p d

What is the normality of 0.5 M phosphoric acid?

Option: 1

1.0


Option: 2

0.9


Option: 3

1.8


Option: 4

1.5

 


Answers (1)

best_answer

Normality is a way to calculate the concentration of solute in a solution. Normality is the number of gram equivalents per unit volume of solution.

Molarity is the number of moles of solute per unit volume of solution 

 Normality=\frac{Gram\,equivalent\,of\,solute}{Volume\,of\,Solution(l)}\, \\

Gram\,equivalent=\frac{Given\,mass}{Equivalent\,mass} \\

Equivalent\: \,mass=\frac{Molar\,mass}{Acidity/Basicity} \\

\Rightarrow Normality=\left( \frac{Given\,mass}{Molar\,mass}\times Acidity/Basicity \right)\times {}^{1}/{}_{Volume\,of\,solution} \\

\Rightarrow Normality=\,Molarity\times Acidity/Basicity \\

According to the question Molarity=0.5

the basicity of phosphoric acid  \left( {{H}_{3}}P{{O}_{4}} \right)=3

 \therefore Normality=\,0.5\times 3=1.5

Posted by

Ritika Jonwal

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