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Activity in Chemical Equilibrium (Oxley)

Last updated

Oct 14, 2020
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- Activity in Chemical Equilibrium (Mullaugh)
- Analog to Digital Conversion

Contributor
Analytical Sciences Digital Library

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Learning Objectives

After completing this exercise, students will be able to:

Calculate the ionic strength of a solution.
Determine the activity coefficient for species in solution.
Perform equilibrium calculations using activity.

Calculate the solubility of calcium oxalate, CaC₂O₄, in (a) water and (b) 0.050 M CaCl₂. The K_sp for CaC₂O₄ is 1.3 x 10^-8.

Calculate the ionic strength of a solution containing 0.050 M CaCl₂.

Would an equimolar solution of NaCl or CaCl₂ have a higher ionic strength? Explain.

Calculate the solubility of calcium oxalate, CaC₂O₄, in 0.050 M CaCl₂, including activity coefficients in your calculation. The K_sp for CaC₂O₄ is 1.3 x 10^-8.

What is the relative error resulting from neglecting activities in calculating the solubility of CaC₂O₄ in a 0.050 M solution of CaCl₂?

What is the relative error resulting from neglecting activities in calculating the pH of a 0.100 M HCl solution?

Contributors and Attributions

Susan Oxley, St. Mary’s University (San Antonio) (soxley@stmarytx.edu)
Sourced from the Analytical Sciences Digital Library

Contributors and Attributions

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