\(n_{CaCl_2}=0,1.1,5=0,15\left(mol\right)\)
\(PTHH:Na_2CO_3+CaCl_2\rightarrow2NaCl+CaCO_3\)
(mol)_____0,15_________0,15_____0,3_______0,15
\(m_{\downarrow\left(CaCO_3\right)}=100.0,15=15\left(g\right)\)
\(C_{M_{Na_2CO_3}}=\frac{0,15}{0,05}=3\left(M\right)\)
\(C_{M_B}=\frac{0,3}{0,15}=2\left(M\right)\)