99. When titrating 50.00 ml of a mixture of NaOH and NH3 with a 0.010 M HCl solution, the following data were obtained:
V(HCl), ml 0.0 1.00 2.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00
x, cm 6.30 5.41 4.52 3.62 3.71 4.79 5.85 6.93 9.00 12.08 15.13
Construct a titration curve and calculate the concentration of NaOH and NH3 in the test solution (g/l).

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