103. Determine the concentration (mol / l) of the CH3COOH solution, if, when titrating 10.00 ml of this acid with 0.1000 M NaOH, the following results were obtained - Table 39.
Table 39
V, ml
(NaOH) 10.0 18.0 19.0 19.5 19.9 20.0 20.1 20.5 21.0
pH 4.76 5.71 6.04 6.35 7.06 8.79 10.52 11.22 11.51
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