1) Osmosis is the process responsible for carrying nutrients and water from grou

Question

1) Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can be as high as 19.1atm . What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?C ? Express your answer to three significant figures and include the appropriate units.
2) Use Henry's law to determine the molar solubility of helium at a pressure of 1.6atm and 25 ?C. 1) Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The osmotic pressures required for this process can be as high as 19.1atm . What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?C ? Express your answer to three significant figures and include the appropriate units.
2) Use Henry's law to determine the molar solubility of helium at a pressure of 1.6atm and 25 ?C.

Explanation / Answer

1)osmotic pressure= C*R*T

or 19.1=C*(273+28)/12

or C=0.4614 M

2)henry's constant for helium=3.7*10^-4

so molar solubility=P*Kh

=1.6*3.7*10^-4

=5.92*10^-4 M

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