A standard solution of 0.243 m naoh was used to determine the concentration of a hydrochloric acid solution. if 46.33 ml of naoh is needed to neutralize 10.00 ml of the acid, what is the molar concentration of the acid?

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19-06-2017
Chemistry

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A standard solution of 0.243 m naoh was used to determine the concentration of a hydrochloric acid solution. if 46.33 ml of naoh is needed to neutralize 10.00 ml of the acid, what is the molar concentration of the acid?

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amrest amrest · Answer 1 · 2017-06-26T16:46:30+02:00

The reaction of NaOH and HCl is as follows: NaOH+HCl⇒NaCl+H2O. So the ratio between the two reactants is NaOH:HCl=1:1. According to the question, the moles of NaOH needed to neutralize the acid is 0.243M*0.04633L=0.01126mole. Because is the above ratio (1:1), the moles of acid that are being neutralized is also 0.01126mole. So the concentration of the acid is 0.01126mole/0.010L = 1.126 M.