Question

Calculate the concentration of NaOH solution in g/mL, which has the same normality as that of a solution of HCl of concentration 0.04 g/mL.

Answer 1

$N_{HCl}=\frac{W_B\times 1000}{E_B\times V}=\frac{0.04\times 1000}{36.5\times 1}=1.095$
$N_{NaOH}=N_{HCl}$
$\therefore 1.095=\frac{W_B\times 1000}{40\times 1}$
$W_B=0.0438g/mL$