Дано: m(NaOH)=8гр +HCL m(NaCl)=?

NaOH + HCl ⇒ NaCl + H2O n(NaOH) = 8/40 = 0.2 моль n(NaOH) = n(NaCl) m(NaCl) = 0.2*58 = 11.6 г