[ILoveISO]

A white powder, consisting of a simple mixture of tartaric acid (C4H6O6) and citric acid (C6H8O7) was analysed to determine the elemental composition.  Combustion of a 352.5-mg sample produced 454.4 mg of CO2 and 130.0 mg of H2O. Use atomic masses: C 12.011; H 1.00794; O 15.9994.

Calculate the % tartaric acid, by mass, in the sample

[Borek]

Assume m_Cit and m_Tart are masses of both acids, write equations for mass of the sample and masses of th eproducts (hint: stoichiometry of the combustion reaction).