Question

Find the mass of NaOH present in 250 ml of a seminormal solutions

Answer 1

semi normal solution means , its normality is = N/2

since NaoH has V.f = 1

so, molarity = Normality/v.f = 1/2M

so, moles of NaOH = M*V = 0.5*(0.250l) = 0.125moles

and mass of 0.125moles NaOH = 0.125*40 = 5grams