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1- Copper (II) oxalate (CuC2O4) is a sparingly soluble salt with Ksp=4.43Ã—10âˆ’10. Cupric ions (Cu2+) form a complex with excess oxalate ions in solution according to the following equation:
The Kf for this reaction is 1.7Ã—1010. What is the molar solubility of CuC2O4 in a 0.10 M Na2C2O4 solution?
2-A solution is prepared that is 0.500 M cyanoacetic acid (
HC3H2NO2) and 0.500 M in sodium cyanoacetate (NaC3H2NO2). What is the final pH of the solution after 0.300 moles of NaOH are added? The (Ka) of cyanoacetic acid is (3.39Ã—10âˆ’3). Assume the change in volume is negligible.