The Molarity \((\mathrm{M})\) of an aqueous solution containing \(5.85 \mathrm{~g}\) of NaCl in \(500…

The Molarity \((\mathrm{M})\) of an aqueous solution containing \(5.85 \mathrm{~g}\) of NaCl in \(500 \mathrm{~mL}\) water is : (Given : Molar Mass \(\mathrm{Na}: 23\) and \(\mathrm{Cl}: 35.5 \mathrm{gmol}^{-1}\) )
  1. 2
  2. 20
  3. 4
  4. 0.2

Solution

$\begin{aligned} & \mathrm{M}=\frac{\mathrm{n}_{\mathrm{NaCl}}}{\left.\mathrm{V}_{\mathrm{sol}} \text { (in } \mathrm{L}\right)} \\ & \mathrm{M}=\frac{\frac{5.85}{58.5}}{0.5}=0.2 \mathrm{M}\end{aligned}$

Asked in: JEE Main 2024 (04 Apr Shift 1)

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