AP EAMCET201822 Apr 2018Evening ShiftChemistrySome Basic Concepts of ChemistryActual
To 50 ~mL of 0.1 ~N Na ₂ CO ₃ solution 150 ~mL of water is added. What is the molarity of resultant solution?
Options
- AM 40
- BM 20
- CM 80
- DM 30
Correct answer
C. M 80
Step-by-step solution
Initial volume (V₁ )=50 ~mL Initial normality (N₁ )=0.1 ~N Final volume (V₂ )=50+150=200 ~mL Final normality (N₂ )= To find and, N₁ V₁=N₂ V₂ 0.1 50=(=N) 200 N₂= (0.1 50) N 200 = N 40 Also, Z for Na ₂ CO ₃=2 (where, Z= total positive charge in Na ₂ CO ₃ ) and N (normality) =M Z (where, M is molarity). Molarity of resultant solution = N 40 1 2 = M 80