\(n_{CaO}=\dfrac{11.2}{56}=0.2\left(mol\right)\)
\(CaO+2HCl\rightarrow CaCl_2+H_2O\)
\(0.2........0.4............0.2\)
\(n_{HCl}=0.4\left(mol\right)\)
\(m_{CaCl_2}=0.2\cdot111=22.2\left(g\right)\)
\(V_{dd_{HCl}}=\dfrac{0.4}{2}=0.2\left(l\right)\)
\(a)\ CaO + 2HCl \to CaCl_2 + H_2O\\ n_{CaO}= \dfrac{11,2}{56} = 0,2(mol)\\ n_{HCl} = 2n_{CaO} = 0,2.2 = 0,4(mol)\\ b)\ n_{CaCl_2} = n_{CaO} = 0,2(mol)\\ \Rightarrow m_{CaCl_2} = 0,2.111 = 22,2(gam)\\ c) V_{dd\ HCl} = \dfrac{0,4}{2} = 0,2(lít)\)