4. Solving a chemistry problem

4. Solving a chemistry problem

4. A sample of an organic compound weighing m (mg) was subjected to pyrolysis under conditions when the sulfur in the substance turns into hydrogen sulfide. The gaseous decomposition products after the chromatographic separation of cyan were passed into a conductometric cell containing a solution of mercury nitrate. As a result, the resistance of the solution in the cell increased to ΔRх. Standard samples were subjected to the same transformations, ΔR values were measured and the following data were obtained:
m, mg 0.250 0.270 0.290 0.310
ΔR•106, Ohm 450 480 510 540
Construct a calibration graph and calculate the mass fraction w (%) of carbon in an organic compound using the following data:
Option 11
m, mg 1.315
ΔRx*10^6, Ohm 430

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