### Equilibrium Constant Calculation for Hydrocyanic AcidConsider the following equilibrium reaction for hydrocyanic acid, HCN:\[ \text{HCN} \leftrightarrow \text{H}^+ + \text{CN}^- \]At 25°C the concentrations are found to be:- \([\text{HCN}] = 0.0160 \; \text{M}\)- \([\text{H}^+] = [\text{CN}^-] = 2.0 \times 10^{-6} \; \text{M}\)**Question:**What is the value of the equilibrium constant at 25°C? (Show your work.)#### Solution:For the equilibrium reaction:\[ \text{HCN} \leftrightarrow \text{H}^+ + \text{CN}^- \]The equilibrium constant expression (\(K_c\)) is given by:\[ K_c = \frac{[\text{H}^+][\text{CN}^-]}{[\text{HCN}]} \]Given the concentrations:\[ [\text{HCN}] = 0.0160 \; \text{M} \]\[ [\text{H}^+] = 2.0 \times 10^{-6} \; \text{M} \]\[ [\text{CN}^-] = 2.0 \times 10^{-6} \; \text{M} \]Substitute these values into the equilibrium constant expression:\[ K_c = \frac{(2.0 \times 10^{-6} \; \text{M})(2.0 \times 10^{-6} \; \text{M})}{0.0160 \; \text{M}} \]Calculate the product of the concentrations of \(\text{H}^+\) and \(\text{CN}^-\):\[ (2.0 \times 10^{-6} \; \text{M}) \times (2.0 \times 10^{-6} \; \text{M}) = 4.0 \times 10^{-12} \; \text{M}^2 \]Now divide by the concentration of \(\text{HCN}\):\[ K_c = \frac{4.0 \times 10^{-12}

Kc value can be calculated from the given balanced equilibrium reaction.

Consider the following equilibrium reaction for hydrocyanic acid, HCN. HCNHH* +CN- At 25°C the concentrations are found to be [HCN] = 0.0160 M and [H+] = [CN-] = 2.0 x 10-6 M. What is the value of the equilibrium constant at 25°C? (Show your work.)

Consider the following equilibrium reaction for hydrocyanic acid, HCN. HCNHH* +CN- At 25°C the concentrations are found to be [HCN] = 0.0160 M and [H+] = [CN-] = 2.0 x 10-6 M. What is the value of the equilibrium constant at 25°C? (Show your work.)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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