6. The following values of electrical conductivity of standard solutions of acetic acid were obtained:
s, mol/dm3 0.167 0.833 1.666 2.500 3.333
χ, Ohm-1cm-1 3.50 1.46 0.90 0.64 0.47
After diluting the acetic essence by 5 times, the electrical conductivity of the solution was 1.2 Ohm-1cm-1; take the density of the essence equal to 1.0 g/cm3. Find the mass fraction of acetic acid in the essence.
Answer options:
1) 9% 2) 18% 3) 36% 4) 72%

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