Question

Calculate the molarity of NaCl solution, if 5.85 gm of NaCl is dissolved in 500 ml of solution. 

(1) 0.1 M 

(2) 0.2 M 

(3) 0.32 M 

(4) 0.4 M

Answer 1

Correct answer is :(2) 0.2 M

Molarity = \(\frac{Numver \ of\ moles\ of\ slute}{Volume \ of \ solution(in\ L)}\) 

= \(\frac{5.85\times1000}{58.5\times100}=0.1\times2=0.2\ M\)