Unformatted text preview: is needed. What
volumes of HNO2 and KNO2 are required to make 1.000 L of the
buffered solution? Practice Exam #9
A 50.0 mL sample of 2.0 x 10-4 M CuNO3 is added to 50.0 mL of
4.0 M NaCN. Cu+ reacts with CN– to form the complex ion
Cu(CN)32– which has a Kf of 1.0 x 109.
a. What are the concentrations of Cu+ and CN– at equilibrium?
a. Practice #9b
What mass of CuI (Ksp = 1.3 x 10-13) can be dissolved
in 1.0 L of 1.0 M NaCN?...
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