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10 Nov 2019

Use a d orbital diagram to predict any changes in color and paramagnetism that might
occur when aqueous chromium as Cr(H2O)6
2+ reacts with NaCN. The spectrochemical series
is:
I-<Br-<Cl-<OH-<F-<H2O<NH3<en<CN-<CO

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Irving Heathcote
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8 Jun 2019

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Related questions

I will reward as soon as I check the answers. Comment if youhave any questions.

Ch.18 - Salt Solutions and Lewis Acid/Bases


1. In the following reactions, identify each of the reactants asa lewis acid or a lewis base.

a. (Cr^3+) + 6H2O <--> Cr(H2O)^3+subscript 6

b. BeF2 + 2F- <---> BeF^2- subcript 4


2. a) Write the chemical reaction for the ion that can onlyhydrolyze for an aqueous solution of sodium cyanide, NaCN.

b) Label each chemical species in the reaction as an acid orbase.

c) Given the Ka, of HCN, what is the Kb for CN-?

d) Calculate the OH- concentration in an aqueous solution of0.010 M NaCN.

e) Calculate the pH of 0.010 M NaCN.

(show work please)



The following order is observed in the spectrochemical seriesfor the ligands
CN- > NO2- > en >NH3 > H2O >C2O42- > OH- >F- > Cl- > Br- >I-

Which of these complex ions would absorb light with thelongest wavelength?

Co(NH3)6]2+
[CoF6]4-
[Co(H2O)6]2+
[Co(CN)6]4-
[Co(en)6]2+

Unpaired Electrons and CFSE's with d-orbital splitting

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