The active ingredient in Antabuse, a drug used for the treatment of chronic
alcoholism, is tetraethylthiuram disulfide,
S S
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(C2H5)2NCSSCN(C2H5)2
(296.54 g/mol). The sulfur in a 0.4169-g sample of an Antabuse preparation was oxidized to SO2, which
was absorbed in H2O2 to give H2SO4. The acid was titrated with 19. 25 mL of 0.04216 M base. Calculate
the percentage of active ingredient in the preparation.
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