\(n_{Cl_2}=\dfrac{4.48}{22.4}=0.2\left(mol\right)\)
\(2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\)
\(0.4...........0.2..........0.2.........0.2\)
\(V_{dd_{NaOH}}=\dfrac{0.4}{4}=0.1\left(l\right)\)
\(C_{M_{NaCl}}=\dfrac{0.2}{0.1}=2\left(M\right)\)
\(C_{M_{NaClO}}=\dfrac{0.2}{0.1}=2\left(M\right)\)