   Chapter 13.4, Problem 13.7CYU

Chapter
Section
Textbook Problem

Bradykinin is a small peptide (9 amino acids; 1060 g/mol) that lowers blood pressure by causing blood vessels to dilate. What is the osmotic pressure of a solution of this protein at 20 °C if 0.033 g of the peptide is dissolved in water to give 50.0 mL of solution?

Interpretation Introduction

Interpretation: The osmotic pressure of the Bradykinin solution measured at 20oC, to be identified.

Concept introduction:

Osmotic pressure: The pressure created by the column of solution for the system at equilibrium is a measure of the osmotic pressure.

Osmotic pressure, Π = cRT,where,cismolar concentration,Ris Gas constant,Tisaabsolute temperature.

Explanation

Given data:

Molar Mass of Bradykinin (solute) = 1060 g/mol.Mass of Bradykinin  = 0.033 gVolume of Water = 50 mlT = 20C = 20C+273=293KΠ=?

Osmotic pressure can be calculated using the equation:

Osmotic pressure, Π = cRT,where,cismolar concentration,Ris Gas constant,Tisaabsolute temperature.

Thus the concentration should be calculated.

no.of molesMassMolar mass 0

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