By titration, it is found that 37.5 mL of 0.200 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
We can following formula
Va x Na = Vb x Nb
Va = 37.5 ml Na = 0.2 M Vb = 25 ml Nb = ?
Substitute the values and calculate the Nb
Nb = 37.5 ml x 0.2 M / 25 ml
Nb = 0.3 M
Hence concentration of HCl is 0.3 M
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