Hydrogen peroxide decomposes according to the balanced molecular equation 2 H2O2(aq)…
CHEMISTRY · Multi-part · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
Hydrogen peroxide decomposes according to the balanced molecular equation
2 H2O2(aq) → 2 H2O(l) + O2(g)
In a particulate-level model, atoms are represented as spheres: hydrogen as small white spheres and oxygen as larger red spheres. A chemist would like to depict two full stoichiometric cycles of this reaction (i.e., representing exactly twice the amount shown in the balanced equation).
(a) Confirm quantitatively that the balanced equation conserves both hydrogen and oxygen atoms for ONE stoichiometric cycle.
(b) Describe in detail the particulate representation of the reactant mixture for TWO stoichiometric cycles. Your description should specify the exact number of H and O spheres present, how they are grouped into molecules, and how those molecules are arranged relative to one another (no particular geometry is required, but clearly indicate molecular identity).
(c) Describe the particulate representation of the products after the reaction has gone to completion for the same TWO stoichiometric cycles. Again, specify atom counts, molecular grouping, and phase distinctions among the water molecules and oxygen molecules.
(d) Explain how the before-and-after descriptions you provided demonstrate both the law of conservation of mass and the stoichiometric coefficients in the balanced equation.