Exam4 - Name 1 Consider the following equilibrium aA(s...

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Name: ___________________________________________________________ 1. Consider the following equilibrium:aA(s) + bB(aq) dD(aq) + eE(aq)Write the expression for the equilibrium constant Keq. 10 ptsKeq= 2. Consider the following equilibrium:CaCl2(s) Ca+2(aq) + 2 Cl-(aq)Calculate the equilibrium constant at 298K from the thermodynamic data provided.10 pts3. Consider a saturated solution of MgCl2at equilibrium with excess MgCl2(s):MgCl2(s) Mg+2(aq) + 2 Cl-(aq) Ho= + 585kJ/molHow do the following changes affect the amount of dissolved MgCl2?a) More MgCl2(s) is added.b) Some NaCl is dissolved in the solution.2 pts eachc) Some NaNO3is dissolved in the solution.d) Some pure water is added to the solution.e) The solution is heated.
4. A solution has a pH of 2.43.a) What is [H3O+]?b) What is [OH-]?2.5 pts eachc) What is pOH?d) Would you describe the solution as acidic or basic?

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