A student wants to represent an aqueous solution of Na₂S at the particulate level
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A student wants to represent an aqueous solution of Na₂S at the particulate level. Which description is most consistent with the correct stoichiometry and orientation of water molecules around the ions?
(a) Twice as many S2− ions as Na+ ions, with water molecules oriented with hydrogen atoms toward S2− ions and oxygen atoms toward Na+ ions.
(b) Twice as many Na+ ions as S2− ions, with water molecules oriented so that the hydrogen atoms point toward the S2− ions and the oxygen atoms point toward the Na+ ions.
(c) Twice as many Na+ ions as S2− ions, with water molecules oriented with oxygen atoms toward both ions.
(d) Twice as many Na+ ions as S2− ions, with water molecules oriented with oxygen atoms toward S2− ions and hydrogen atoms toward Na+ ions.