Each of the observations in the following list was made on a different
solution. Given the observations, state which ion studied in this experiment
is present. If the test is not definitive, indicate that with a question mark.
A. Addition of \(6 \mathrm{M} \mathrm{NaOH}\) and \(\mathrm{Al}\) to the solution
produces a vapor that turns red litmus blue.
Ion present:
B. Addition of \(6 \mathrm{M} \mathrm{HCl}\) produces a vapor with an acrid
odor.
Ion present:
C. Addition of \(6 \mathrm{M}\) HCl produces an effervescence. Ion present:
D. Addition of \(6 \mathrm{M} \mathrm{HNO}_{3}\) plus \(1.0 \mathrm{M}
\mathrm{BaCl}_{2}\) produces a precipitate.
Ion present:
E. Addition of \(6 \mathrm{M} \mathrm{HNO}_{3}\) plus \(0.10 \mathrm{M}\) AgNO
\(_{3}\) produces a precipitate.
Ion present:
F. Addition of \(6 \mathrm{M} \mathrm{HNO}_{3}\) plus \(0.5
\mathrm{M}\left(\mathrm{NH}_{4}\right)_{2} \mathrm{MoO}_{4}\) produces a
precipitate.
Ion present:
