Question:

A certain aqueous solution of $FeCl _{3}$ [formula mass $=162]$ has a density of $1.1 g / mL$ and contains $20.0 \% FeCl _{3} .$ Molar concentration of this solution is

Updated On: Apr 2, 2024
  • 0.028
  • 0.163
  • 1.357
  • 1.47
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The Correct Option is C

Solution and Explanation

20% FeCl solution means 100 g of solution contains 20 g FeCl . $\Rightarrow $ Volume of 100 g solution $=\frac{100\,g}{1.1\,g/mL}$ $=90.91 \,mL$ Moles of 20 g FeCl$_{3}=\frac{20}{162}=0.1234$ mole $\Rightarrow$ Molar concentration of solution $=\frac{0.1234}{90.91}\times1000$ $=1.357$ M
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Concepts Used:

Solutions

A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.

For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.

Types of Solutions:

The solutions can be classified into three types:

  • Solid Solutions - In these solutions, the solvent is in a Solid-state.
  • Liquid Solutions- In these solutions, the solvent is in a Liquid state.
  • Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.

On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:

  1. Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
  2. Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
  3. Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.