AP EAMCET202018 Sep 2020Evening ShiftChemistrySome Basic Concepts of ChemistryActual
Calculate the molarity of ( NaOH ) solution prepared by dissolving (0.4 ~g ) of ( NaOH ) in enough water to form (500 ~mL ) of the solution.
Options
- A0.02
- B0.05
- C0.04
- D0.03
Correct answer
A. 0.02
Step-by-step solution
Molarity (= w_B gL ⁻¹ M_B ~g ~mol ⁻¹ = 0.4 500 100 40 =0.02 M ) ( [ w_B= . ) mass of solute (( NaOH )=0.4 ~g / mL ) (M_B= ) molar mass of ( NaOH =40 ~g ~mol ⁻¹ 1 )