Answer the following problems concerning osmotic pressure: a) Suppose we have an
ID: 977498 • Letter: A
Question
Answer the following problems concerning osmotic pressure:
a) Suppose we have an osmometer that is constructed from a capillary tube with a membrane in the middle, and that the tube is oriented horizontally. Some solute in introduced on one side of the tube only. Explain what happens and why the tube is horizontal.
b) A 1M solution of glucose gives an osmotic pressure more than 25 times greater than atmospheric pressure. A 1M solution of salt gives an even bigger osmotic pressure. Why?
c) Suppose we add 0.001M glucose to one side of an osmometer and 0.001M hemoglobin to the other side. Will the water change? Why or why not?
Explanation / Answer
A. The membranne will create a pressure on the trapped air inside. that change in pressure is measured. if you vertically insert the tube hydrullic pressure cn be measured, not the osmotic pressure.
B. in glucose solution glucose io can be seen. they create more pressure on membrne. in salt solution sodium and chlorise ions can be seen. ions can create more pressure than molecules.
C. no. because here ic no a concentration gradient