51. When titrating a solution of BaCl2 0.2000 n. H2SO4 received the following data on the scale of a high-frequency instrument:
V H2SO4, ml Instrument readings for variants.
a B C
2.0 62.0 68.3 71.4
4.0 43.0 50.5 55.1
6.0 29.5 34.5 39.2
8.0 22.0 28.0 31.2
10.0 19.2 21.5 24.6
Build a titration graph and determine the content of BaCl2 (g) in the test solution.
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