Question- 1. List three ways in which wells in the spot plate could become contaminated, leading to inaccurate results, and discuss how to prevent each.
2. List four types of observations that would lead you to believe that a chemical reaction has occurred.
3. For unknowns containing the following mixtures of anions, indicate which anions could be definitely identified and which test(s) would identify each. Indicate if an anion could not be distinguished by the tests used in this experiment.
a. Cl-, I-, OH-
b. SO42-, C2O42-, SCN-
Explain each and every step in detail. I need proficient help in the above problems.