7. When titrating 50.00 ml of hydrochloric acid with a solution of 1.012 M NaOH, the following data were obtained:
V NaOH, ml 2.00 4.00 6.00 8.00
w*103, cm 4.05 1.93 2.35 3.27
Plot a titration curve and determine the molar concentration of hydrochloric acid in the solution.

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