Question

Using mold concept, find the concentration of NaOH using 0.10 moldm2 given that the volume of acid used was 12.0cm volume of Base 25cm2

Answer 1

Using mole concept

Given that the chemical reaction is;

$NaOH +HCl\to NaCl + H_2 O$

$C_A = 0.10 \textsf{ mol/dm³}\\ V_A = 12.0cm³\\ V_B = 25cm³\\ C_B = ?$

$\dfrac{C_AV_A}{C_BV_B} = \dfrac{n_A}{n_B}$

$\dfrac{0.10 × 12}{C_B × 25} = \dfrac11$

$C_B = \dfrac{0.10× 12}{25} = 0.048 \textsf{ mol/dm³}$