Question

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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)