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2 November, 03:49

By titration it is found that 38.1 ml of 0.147 m naoh (aq) is needed to neutralize 25.0 ml of hcl (aq). calculate the concentration of the hcl solution.

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  1. 2 November, 07:21
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    You must know what reaction happens during titration:

    HCl + NaOH - - > NaCl + H₂O

    So, the ratio for HCl to NaOH is 1:1.

    The solution is as follows:

    Concentration of HCl = Moles HCl/L solution

    Concentration = (0.147 M NaOH) (0.0381 L) (1mol HCl/1 mol NaOH) / 0.025 L

    Concentration = 0.224 M HCl
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