Molar mass of solutes

Find the amount of each species from the molar masses of solute and solvent. 

For a given matrix, Kj or Kav can be plotted against the log of the molar mass of different solutes. For a given molar mass range, a linear relationship will be observed. Therefore, by applying to the column molecules of known molar mass, and similar shape and density, it is possible to determine the molar masses of solutes present in a sample (Kumpalume and Ghose, 2003 Moraes and Rosa, 2005). 

C. mass of solute = number of moles of solute X molar mass of solute... 

Substituting, we get AT = (A )(grams of solute)/(molar mass of solute)(kg of solvent)... 

Mo is the molar mass of solute. The injected solute molecules are diluted in the supernatant inside the cell and a fraction of them subsequently adsorbs onto solid particles. They displace a certain amount of water pre-adsorbed at the solid-water interface, because of the limited extent of the adsorption space. At equilibrium, there are m grams of water and n moles of solute adsorbed per unit mass of adsorbent. The total operation induces a thermal effect and alters the equilibrium which is recorded as a thermal peak (after about 15-20 min the signal returns to the baseline). These data, once processed by the software, yield the related enthalpy change AexpH. 

Show that for a dilute binary solution, where the solute mole fraction is and the molar masses of solute and solvent are, respectively, M, and M2, that the mass average velocity and molar average velocity are approximately the same if the diluteness criterion xJfMj/M ) - ij 1 is satisfied. Show that in a binary system the mass flux with respect to the mass average velocity is /j = —J2 and that the molar flux with respect to the molar average velocity is / = /I-... 

The measurement of colligative properties is one of the classical methods for determining the molar mass of solute. Although all of these properties have been used at one time or another to measure the molar mass of a polymer, only the osmotic effect is large enough to be generally useful. 

The osmotic pressure of a sohitioo depends on the ctmeentration of solute present it is a coUi tive property. Measurements of osmotic pressure can be used to give the molar masses of solutes. 

The colligative properties of solutions provide a useful means of determining the molar mass of solutes. Any of the four colligative properties can be used, as shown in Sample Exercises 13.10 and 13.11. 

Give an equation that relates molar concentration, volume of solution, mass of solute, and molar mass of solute. 

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