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One important application of reverse osmosis is the desalination of seawater. To extract pure water from seawater using a semi-permeable membrane, pressure must be exerted on the seawater to exceed its osmotic pressure. Osmotic pressure is a colligative property, which depends only on the total molar concentration (M) of solutes: = MRT.
The following table lists the five most abundant salts in seawater and their amounts per cubic meter of seawater.Salt Amount (kg / m3 seawater)NaCl 28.014MgCl2 3.812MgSO4 1.752CaSO4 1.283K2SO4 0.816
Assuming that the other salts present in seawater are in negligible amounts, determine the pressure that must be exerted on seawater to desalinate it using reverse osmosis at 25oC.
A sample containing both enantiomers is found to have an observed rotation of +0.87 degrees in a one dm tube at a concentration of 0.025 g/mL. What is the optical purity of the sample? What is the % of the dominant enantiomer in this sample?
As per the Haber Process(N2(g)+ 3 H2(g)= 2 NH3(g) ) ,what mass of nitrogen should you see in the reaction If you must produce 700g of ammonia? Percent yield of this reaction = 70%
At constant temperature and pressure, how many liters of oxygen would be needed to completely combust 0.350 L of propane?
Identify the substance produced in the liver that helps catalyze this reaction.
Calculate the equilibrium constant for the reaction that occurs when nitric acid is added to the buffer HA
How do you draw 1(R)-chloro-3(R)-bromocyclohexane. What is the enantiomer and diastereomer of 1(R)-chloro-3(R)-bromocyclohexane
The average mass of a carbon atom is 12.011. Assuming you were able to pick up only one carbon atom, the chances that you would choose a carbon atom with a mass of 12.011 is:
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400. g of water.
Calculate the initial pH, pH after addition of 20 mL HCl, pH after addition of 50 mL HCl, pH at the equivalence point, and pH after addition of 120 mL HCl.
Calculate the volume of 1M solution of HCL needed for 1 unit shift of the pH of the following solutions: A. 100 mL of 0.01 M solution weak acid (pKa = 6) and 0.05 M of its sodium salt
What is the theoretical yield of aspirin if 165 of salicylic acid is allowed to react with 111 of acetic anhydride?
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40 of water for your group
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