A pure sample of an anhydrous sulfate has the empirical formula M (SO )
CHEMISTRY · Multi-part · CBSE · Chemistry · Some Basic Concepts of Chemistry · Some Basic Concepts of Chemistry
Problem
A pure sample of an anhydrous sulfate has the empirical formula M2(SO4)3. Quantitative elemental analysis shows that the compound is 27.9\,% by mass element M.
Assume sulfate behaves as a discrete polyatomic ion in the lattice.
(a) Derive an algebraic expression that relates the mass percent of element M to its atomic mass Matomic for the formula M2(SO4)3.
(b) Using the experimental mass percent, calculate the atomic mass of M.
(c) Identify the element M and state its common oxidation state in the compound.
(d) Provide a detailed explanation, based on electron configuration and periodic trends, for why the oxidation state obtained in part (c) is favored for this element when it forms a sulfate.