The following scenes (1, 2, and 3) represent solutions of magnesium (black) and fluoride (green) ions that are above solid magnesium fluoride MgF2. (The solid, other ions, and water are not shown) a. Which scene best represents the solution in equilibrium with the solid in water? [A] b. In which, if any, other scene(s) will additional solid form? [B] c. Once the equilibrium has established in all scenes if applicable, how will addition NaF (aq) affect the mass of solid present in any scene? [C]    

Ammonia has a Kb of 1.8×10−5. Three ammonia/ammonium chloride (NH3/NH4Cl) buffer solutions, A, B, and C, were made using varying concentrations. What is the pH of each of the following three solutions?  Enter each of your answers to two decimal places.  A. NH3 ten times greater than NH4Cl, pH = [one] B. NH4Cl ten times greater than NH3, pH = [two] C. NH3 = NH4Cl, pH = [three] 

Which one(s) of the following combinations (I to VI) that after being mixed can possibly create a buffer solution? Select ALL that apply.

In the formation of a transition metal complex, the central metal atom or ion acts as:

The following scenes (1, 2, and 3) represent solutions of calcium (gray) and iodate (black and red) ions that are above solid calcium iodate Ca(IO3)2. (The solid, other ions, and water are not shown)   a. Which scene best represents the solution in equilibrium with the solid in water? [A] b. In which, if any, other scene(s) will additional solid form? [B] c. Once the equilibrium has established in all scenes if applicable, how will addition Ca(NO3)2 (aq) affect the mass of solid present in any scene? [C]

Give the systematic name for [Ni(en)2(H2O)2]Cl2 (where en = ethylenediamine)

I hereby swear that I accept and will comply to all aspects of the UF honor code including the assertion: “I have neither given nor received any unauthorized aid in the execution of this exam” I am also currently shredding my scratch paper.

A popular buffer solution consists of carbonate (CO32–) and hydrogen carbonate (HCO3–) conjugate acid-base pair.  Which, if any, of the following such buffers can neutralize the greatest amount of added sodium hydroxide, while remaining within its buffer range?

  Determine whether a 0.1M solution formed from each of the following salts would be acid, basic, or neutral. NaNO3 [1] NH4Cl [2] KNO2 [3] NH4HCO3 [4] NaHS [5]  

  Determine whether a 0.1M solution formed from each of the following salts would be acid, basic, or neutral. KCl [1] NaCN [2] CH3NH3I [3] NH4ClO [4] NaHCO3 [5]