AP EAMCET202021 Sep 2020Morning ShiftChemistrySome Basic Concepts of ChemistryActual
The molarity of (0.2 ~N Na ₂ CO ₃ ) solution will be
Options
- A(0.05 M )
- B(0.2 M )
- C(0.1 M )
- D(0.4 M )
Correct answer
C. (0.1 M )
Step-by-step solution
(n ) - factor for ( Na ₂ CO ₃=2 ) ( ) The (n )-factor of such salts is defined as the number of moles of electrons exchanged (lost or gained) by one mole of the salt and there is the exchange of 2 electrons, so its (n )-factor is 2. Therefore, normality (=n )-factor ( ) molarity ( ) Molarity (=0.2 / 2=0.1 M ) Hence, the correct option is (c).