Answer to Question #223081 in General Chemistry for Felix

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;

$NaOH +HCl\to NaCl + H_2 O$

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

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

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

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