When titrating 50 ml of a mixture of NaOH and NH3 with 0.01 M HCl, the following data were obtained for the mixture:

V (HCI), ml 0 1 2 3 4 5 6 7 8 9 10
χ* 103 cm 5.68 4.46 3.20 - 3.00 3.84 4.68 5.50 7.00 10.80 14.55
Construct a titration curve and calculate the concentration (g/l) of NaOH and NH3 in the test solution.

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