Question:
150 g of acetic acid was contaminated with 10.2 g ascorbic acid (C6H8O6) to lower down its freezing point by (x × 10–1)°C. The value of x is ______. (Nearest integer)(Given : Kf = 3.9 K kg mol–1; molar mass of ascorbic acid = 176 g mol–1)
150 g of acetic acid was contaminated with 10.2 g ascorbic acid (C6H8O6) to lower down its freezing point by (x × 10–1)°C. The value of x is ______. (Nearest integer)
(Given : Kf = 3.9 K kg mol–1; molar mass of ascorbic acid = 176 g mol–1)
Updated On: Feb 2, 2024
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Solution and Explanation
M.wt. of Acetic acid = 60 g
M.wt. of Ascorbic acid = 176 g
\(\begin{array}{l}\Delta T_f = K_f m\end{array}\)
\(\begin{array}{l}\Delta T_f = \frac{3.9 \times 10.2 \times 1000}{176 \times 150}\end{array}\)
\(\begin{array}{l}\Delta T_f =1.506\\= 15.06 × 10^{–1}= 15\end{array}\)
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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:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- 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.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.