.08206 L X atm... Or the 273 degrees HELP PLEASE the osmotic pressure at 25.0°C
ID: 982008 • Letter: #
Question
.08206 L X atm... Or the 273 degrees HELP PLEASEthe osmotic pressure at 25.0°C is observed to be 0.3930 aull What is the mass percent of MgCl2 in the solid? (Assume ideal behavior for the solution.) 115. Formic acid (HCO,H) is a monoprotic acid that ionizes only par- tially in aqueous solutions. A 0.10 M formic acid solution is 4.2% ionized. Assuming that the molarity and molality of the solution are the same, calculate the freezing point and the boiling point of 0.10 M formic acid. 116. You have a solution of two volatile liquids, A and B (assume ideal behavior). Pure liquid A has a vapor pressure of 350.0 torr and pure liquid B has a vapor pressure of 100.0 torr at the temperature of the solution. The vapor at equilibrium above the solution has double the mole fraction of substance A that the solution does. What is the mole fraction of liquid A in the solution? 117. In some regions of the southwest United States, the water is very hard. For example, in Las Cruces, New Mexico, the tap water contains about 560 g of dissolved solids per milliliter. Reverse osmosis units are marketed in this area to soften water. A typical unit exerts a pressure of 8.0 atm and can produce 45 L water per day a. Assuming all of the dissolved solids are MgCO, and assum- ing a temperature of 27°C, what total volume of water must be processed to produce 45 L pure water? b. Would the same system work for purifying seawater? (As sume seawater is 0.60 M NaC1.) Integrative Problems hese problems require the integration of multiple concepts to find the
Explanation / Answer
Hello. The value 0.08206 L*atm / K*mol is the value of the universal gas constant. When you are calculating gases you use kelvin rank. Its formula is K = °C+273.15.
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