a. Ta có :
\(n_{Cl2}=0,05\left(mol\right)\)
Chất dư là NaOH.
\(n_{NaOH\left(Dư\right)}=0,05.0,2=0,01\left(mol\right)\)
b.
\(PTHH:2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\)
_________0,1_______0,05_____________________
Theo pt: \(n_{NaOH\left(pư\right)}=0,1\left(mol\right)\)
\(\Rightarrow CM_{NaOH\left(bđ\right)}=0,1+0,01=0,11\left(l\right)\)
c. \(CM_{NaOH\left(bđ\right)}=\frac{0,11}{0,2}=0,55M\)