Calculating the Solubility Product Constant of CaSO4 - Faculty web ...

Post Lab Questions1.) Your calculated K sp most likely came out significantly greater than the published value. Thisis due to the fact that the sulfate ion can act a base. Write a net-ionic reaction showing sulfateacting as a base, and explain why this would lead to an increase in your calculated K sp . (hint:remember Le Chtelier’s Principle)2.) If the pH was decreased, would solubility of CaSO 4 increase or decrease?3.) A CuCl solution is prepared, where [Cu + ] = [Cl - ] = 2.0 X 10 -4 M. Is the solution atequilibrium? Explain4.) Calculate the solubility of AuI 3 when it is added to a 0.750 M Au(NO 3 ) 3 solution (include allreactions).Pre-Lab Questions1.) What does EDTA stand for?2.) Write the K sp expression for CaSO 4 .3.) Which of the following would increase the solubility of AgCN (s)?a.) Adding a strong acidb.) Adding NH 3 to form complex ions with Ag +c.) Adding NaCN (aq)d.) Both a and b4.) The molar solubility of a slightly soluble ionic compound M 2 X 3 is 2.8 X 10 -6 M. Determinethe value of K sp5.) What is the purpose of the eriochrome black T in this experiment?