A compound of formula X Cl3 reacts with aqueous AgNO 3 to...

A compound of formula $X \mathrm{Cl}_{3}$ reacts with aqueous AgNO $_{3}$ to yield solid AgCl according to the following equation: $$\mathrm{XCl}_{3}(a q)+3 \mathrm{AgNO}_{3}(a q) \longrightarrow \mathrm{X}\left(\mathrm{NO}_{3}\right)_{3}(a q)+3 \mathrm{AgCl}(s)$$ When a solution containing 0.634 $\mathrm{g}$ of $\mathrm{XCl}_{3}$ was allowed to react with an excess of aqueous AgNO $_{3}, 1.68 \mathrm{g}$ of solid $\mathrm{AgCl}$ was formed. What is the identity of the atom $\mathrm{X}$ ?

A compound of formula $X \mathrm{Cl}_{3}$ reacts with aqueous AgNO $_{3}$ to yield solid AgCl according to the following equation:
$$\mathrm{XCl}_{3}(a q)+3 \mathrm{AgNO}_{3}(a q) \longrightarrow \mathrm{X}\left(\mathrm{NO}_{3}\right)_{3}(a q)+3 \mathrm{AgCl}(s)$$
When a solution containing 0.634 $\mathrm{g}$ of $\mathrm{XCl}_{3}$ was allowed to react with an excess of aqueous AgNO $_{3}, 1.68 \mathrm{g}$ of solid $\mathrm{AgCl}$ was formed. What is the identity of the atom $\mathrm{X}$ ?

Key Concepts

Molar Mass Determination

Molar mass determination involves calculating the mass of one mole of a compound or element from experimental measurements. By combining measured masses with mole ratios from the balanced reaction, the identity or formula of a compound can be deduced.

Gravimetric Analysis

Gravimetric analysis is an analytical method that determines the quantity of an analyte based on the mass of a solid. In this method, a target compound is precipitated, isolated, and weighed, allowing for the determination of the original substance's composition.

Atomic Mass Identification

Atomic mass identification is the process of determining an unknown element’s atomic weight through experimental data. By comparing calculated molar masses with known atomic masses from the periodic table, one can infer the identity of the unknown element.

Stoichiometry

Stoichiometry involves using the balanced chemical equation to relate the moles of reactants to the moles of products. It allows one to determine the amounts of each substance consumed and produced in a chemical reaction based on mole ratios.

Precipitation Reaction

A precipitation reaction is a type of chemical reaction in which a solid forms when two aqueous solutions are mixed. In such reactions, an insoluble salt (precipitate) is produced, and its formation can be analyzed quantitatively.

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