Question 15: Taking activities into account, calculate the s…

Question 15: Taking activities into account, calculate the solubility of Mg2+ in an aqueous solution of 0.010 M KF. The solubility product constant (Ksp) for MgF2 is 6.6 * 10-9. (Hints:  Assume that the ionic strength of this solution is 0.01 and use Table “10-2” at the end of the exam to simply look up the appropriate activity coefficients. Also, it might be convenient to write out the reaction equation to set up the solubility product correctly.)

Question 12: An additional measurement of the standard sampl…

Question 12: An additional measurement of the standard sample provided by the United States Department of Agriculture Food Safety and Inspection Service gave a value of 33.0 ppb. Are the technicians right to exclude the measurement of the first day as an outlier at the 90% confidence level? (Hint: You will need to perform a Q-test to solve this problem)