Question:
2.5 g of protein containing only glycine (C2H5NO2) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5.03 × 10–3 bar. The total number of glycine units present in the protein is _______.
(Given : R = 0.083 L bar K–1 mol–1)
2.5 g of protein containing only glycine (C2H5NO2) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5.03 × 10–3 bar. The total number of glycine units present in the protein is _______.
(Given : R = 0.083 L bar K–1 mol–1)
(Given : R = 0.083 L bar K–1 mol–1)
Updated On: May 27, 2025
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Correct Answer: 330
Solution and Explanation
The correct answer is 330
Since, π = icRT
\(5.03×10^{−3}=\frac{2.5}{M}×\frac{1000}{500}×0.083×300\)
Molar mass of protein = 24751.5 g/mol
Number of glycine units in protein
\(=\frac{24751.5}{75}\) = 330
So, The total number of glycine units present in the protein is 330.
Since, π = icRT
\(5.03×10^{−3}=\frac{2.5}{M}×\frac{1000}{500}×0.083×300\)
Molar mass of protein = 24751.5 g/mol
Number of glycine units in protein
\(=\frac{24751.5}{75}\) = 330
So, The total number of glycine units present in the protein is 330.
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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.