b
b
\(\begin{array}{l}{\left[ Co \left( NH _3\right)_5 SO _4\right] Br + AgNO _3 \rightarrow AgBr \downarrow} \\ 0.01\, mol \qquad\quad \text { excess } \quad 0.01\,Mol \\ {\left[ Co \left( NH _3\right)_5 Br \right] SO _4+ BaCl _2 \rightarrow BaSO _4 \downarrow} \\ 0.01 mol \qquad\quad \text { excess } \quad 0.01\,Mol \\\end{array}\)