$6-9$

Applications of Analysis

Predict and describe what you would observe if solutions containing the following solutes are mixed. Hint: use your experience in the lab.

a$.HN{O}_3$ and $R{b}_{2}C{O}_3$

b$.BaB{r}_2$ and $N{a}_{2}C{O}_3$

c$.Ba(N{O}_3{)}_2$ and $K_{2}S{O}_4$

d$.Fe(Cl{O}_3{)}_3$ and $N{H}_3$

e$.Ca(OH{)}_2$ and phenolphthalein

f$.CuC{l}_2$ and LiOH

In some qualitative analysis tests, chemical reactions are used to test for the presence or absence of certain species. For example, to test for the presence or absence of chloride ions $(C{l}^{-})$in solution, you could add a solution of silver nitrate $(AgNO).$ If a white precipitate $(AgCl)$ is observed, then $C{l}^{-}$ions are present. If no precipitate is observed, then $C{l}^{-}$ions are absent in the solution.

Suppose you are given a sample of a clear colorless liquid in an anion qualitative analysis experiment. Using reagents and your observations from Experiment $3,$ design a procedure to determine whether the solution contains one of the following four options: $(1)$ only $C{O}_3^{2-}$ anions are present, $(2)$ only $S{O}_4^{2-}$ anions are present, $(3)$ both $C{O}_3^{2-}$ and $S{O}_4^{2-}$ anions are present, or $(4)$ neither of the anions are present. Include expected observations and conclusions in your procedure. $($Refer to the $C{l}^{-}$example above as an example of a procedure, expected observations, and conclusion.$)$

Hint: You will need two or three steps in your procedure.