Equilibria Definition and 55 Threads

  1. N

    Stable Equilibria: Is x = pie a Solution?

    Determine the location of the first postivve (x>0) stable equilibrium position for V(x) = = Vocos((2pie/lambda)x) eventually you will get sin(2pie/lambda)x) = 0 Is a solution for x pie?
  2. D

    What Challenges Arise in Calculating pH Changes in Buffer Solutions?

    1.) What is the pH of a buffer solution that is 0.10 NH3 and 0.10 NH4+? What is the pH if 12mL of 0.20 M hydrochloric acid is added to 125 mL of buffer? For the first part, i figured that NH3 is the base and NH4+ is the conjugate acid. Therefore, the equil. reaction is NH3 + water --> NH4+ OH-...
  3. G

    How Do You Calculate pH for a NaCN and HCN Solution?

    I am stuck on this question...can anyone help? What is the pH after .10 mol NaCN is added to 100 mL of .050 M of HCN? (Ka=6.0x10^-19) I think I have to use the Henderson-Hasselbalch Equation. Is this the right way to take. And if so, how should I go about getting the ion concentration?
  4. P

    Equilibria of HN3: Find Vapor Pressure, Enthalpy & Entropy

    The vapor pressure of HN3 is 58 Torr at -22.75 C and 512 Torr at 25C. Find the standard enthalpy of vaporization, standard entropy of vaporization, the standard free energy of vaporization. I know how to find the first two, but for some reason I can't find the third one...Is the equation for...
  5. I

    What Is the Theory of Punctured Equilibria?

    Can someone point me to a source (english or french) that explains the theory? I'm not even sure this is the exact name, actually.
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