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 Structure activity relationship of methyldopa


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Applications of conductivity measurements: Calculating the solubility product of a partially soluble salt (Lab report) Theory The solubility of poorly soluble salts is expressed as the solubility product. That is the product of the concentration of ions in the solution which are in equilibrium with the solid ion. These concentrations can be determined via conductivity measurements. In this practical PbSO 4  is used.                                  PbSO 4  ⇌  Pb 2+  + SO 4 2- Assume concentration of solid is a constant. Concentration of Pb 2+ = concentration of SO 4 2-  = C                               \   Ksp = [Pb 2+ aq ] [SO 4 2- a...
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Definition of Conductivity and theory

Definition of Conductivity Conductivity is the ability of a material to conduct electric current. The principle by which instruments measure conductivity is simple—two plates are placed in the sample, a potential is applied across the plates (normally a sine wave voltage), and the current that passes through the solution is measured. Conductivity (G), the inverse of resistivity (R), is determined from the voltage and current values according to  Ohm's law. G =   1   R =  I (amps)  E (volts) Since the charge on ions in solution facillitates the conductance of electrical current, the conductivity of a solution is proportional to its ion concentration. In some situations, however, conductivity may not correlate directly to concentration. The graphs shown here illustrate the relationship between conductivity and ion concentration for two common solutions. Notice that the graph is linear for sodium chloride solution, but not for highly conce...
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