Pyrrolidine is a weak base with a Kb of 1.3×10-3.  A mixture of this base with its conjugate weak acid would make a buffer that would be most effective in the pH range of _________?

Based on what we have discussed in lecture, A. Draw on your written paper the condensed orbital diagram (arrows!) for the free ion 106Sg3+. Condensed = you must use the noble gas abbreviation. See the Periodic Table page. This will be graded manually on your written work. B. The number of unpaired electrons in Sg3+ is? Type your answer in the provided space.    

An indicator H2In is diprotic with pKInd1=5.4 and pKInd2 = 10.2. The colors of the related species are: H2In is red, HIn- is blue and In2- is yellow. What color would you expect to see if this indicator is added to a solution with a concentration of [H3O+] of 4.0×10-6 M?

1.6 Choose the correct answer:     Which facts, in the passage, show that something is not right with Bryan’s body? (1)

Consider the formation reaction shown using the metal Snapeium (symbol Sp) and monodentate ligand L: Sp+(aq)  + [n] L (aq) SpL[n]+ (aq)  A solution initially has concentrations of Sp+ = 0.1[a]0 M and L = 0.0[b] M. When concentrations become constant the concentration of SpL[n]+ was found to be 0.0[c]0 M.       Calculate the formation constant, Kf. You must show work for full credit in your upload. Enter your answer in decimal form with correct sig figs. If you have difficulty in Canvas not accepting your answer, make sure it’s clearly shown in your work upload.

Pyridazine has the formula C4H4N2. A buffer is made by mixing solutions of pyridazine and pyridazinium chloride HC4H4N2Cl. Which one of the following is a correct NET IONIC equation for the reaction that occurs when a small amount of strong acid HCl is added to this buffer?  

Let’s compare two hypothetical complexes: CoL62+ is pink (light red) and VL62+ is lavender (blue-violet). L is a neutral ligand. These two complexes have the same number of unpaired electrons.  A. On your paper, draw a labeled orbital diagram for each complex, showing the electron occupancy, labeling each d orbital. B. Based on this evidence, is CoL62+ high spin, low spin or not applicable? [comp1]   C. Which complex has the largest crystal field splitting energy? [energy] Explain your answers in the work you upload.  

For the following complex,  K[ Au(CN)4 ] The coordination number is [CN] The metal charge is [charge] The d electron count is d[e] The likely geometry of the choices given is [geom]

For the following complex,  [ Rh(en)2NH3Br]NO3 The coordination number is [CN] The metal charge is [charge] The d electron count is d[e] The likely geometry is [geom]

Will the following mixture produce a BUFFER solution? 30 mL of 0.2 M NH3 plus 30 mL of 0.2 M NaNH2