309. To determine the concentration of HCl, use the dependence of the electrical conductivity χ on the acid content in the solution:

СHCl, mol/l 0.004 0.007 0.015 0.030 0.060 0.121 0.243
χ 10–4, S cm–1 2.5 3.8 5.0 8.0 12.3 21.0 36.3

Construct a calibration graph based on these data in the coordinates lgχ - lgCHCl and use it to determine the concentration of hydrochloric acid and its content (in g), if its electrical conductivity is 9.2 10–4 S cm–1, and 30 ml HCl.

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