In the experiment, both the Metal B solution and the CrO₄^2- solution have approximate concentrations of 0.1 M. Which test tube(s) would you expect to have excess metal ion B if the concentration of the Metal B solution was 0.2 M? Explain your answer.

\begin{tabular}{|l|l|l|l|l|l|l|l|} \hline Tube \# & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\ \hline #dropsof0.1MmetalionB & 4 & 6 & 8 & 12 & 16 & 18 & 20 \\ \hline \# drops of 0.1MCrO42 & 20 & 18 & 16 & 12 & 8 & 6 & 4 \\ \hline Total \# of drops & 24 & 24 & 24 & 24 & 24 & 24 & 24 \\ \hline Ratio of Metal to CrO42 & 1:5 & 1:3 & 1:2 & 1:1 & 2:1 & 3:1 & 5:1 \\ \hline \end{tabular}