Vitamin C is the simple compound C6 H8 O6. Besides being an acid, it is a reducing agent. One me

step 1 solution is 76 molar mass of 6 is 8 for 6 is 176 number of moles we know is mass 5 volume so mol

Vitamin C is the simple compound C6 H8 O6. Besides being an...

Vitamin C is the simple compound $\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}$. Besides being an acid, it is a reducing agent. One method for determining the amount of vitamin C in a sample is therefore to titrate it with a solution of bromine, $\mathbf{B r}_{2},$ an oxidizing agent. $\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}(\mathrm{aq})+\mathrm{Br}_{2}(\mathrm{aq}) \longrightarrow 2 \mathrm{HBr}(\mathrm{aq})+\mathrm{C}_{6} \mathrm{H}_{6} \mathrm{O}_{6}(\mathrm{aq})$ A $1.00-\mathrm{g}$ " chewable" vitamin C tablet requires $27.85 \mathrm{mL}$ of $0.102 \mathrm{M} \mathrm{Br}_{2}$ for titration to the equivalence point. What is the mass of vitamin C in the tablet?

Vitamin C is the simple compound $\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}$. Besides being an acid, it is a reducing agent. One method for determining the amount of vitamin C in a sample is therefore to titrate it with a solution of bromine, $\mathbf{B r}_{2},$ an oxidizing agent.
$\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}(\mathrm{aq})+\mathrm{Br}_{2}(\mathrm{aq}) \longrightarrow 2 \mathrm{HBr}(\mathrm{aq})+\mathrm{C}_{6} \mathrm{H}_{6} \mathrm{O}_{6}(\mathrm{aq})$ A $1.00-\mathrm{g}$ " chewable" vitamin C tablet requires $27.85 \mathrm{mL}$ of $0.102 \mathrm{M} \mathrm{Br}_{2}$ for titration to the equivalence point. What is the mass of vitamin C in the tablet?

Key Concepts

Mass Calculation

Mass calculation in quantitative analysis involves converting the number of moles of a substance, determined through stoichiometric ratios, into mass using the molar mass, thereby linking the theoretical amount of substance to its physical mass.

Redox Reactions

Redox (reduction-oxidation) reactions involve the transfer of electrons between chemical species; understanding these reactions is important when titrating substances that serve as either reducing agents or oxidizing agents, as their electron transfer characteristics determine the reaction stoichiometry.

Molarity

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution, and it is a fundamental concept in solution chemistry that is crucial for converting between volume and moles during quantitative analyses.

Titration

Titration is an analytical technique used to determine the concentration of a substance in a solution by gradually adding a reactant of known concentration until the reaction reaches the equivalence point, at which stoichiometrically equivalent amounts of both reactants have reacted.

Equivalence Point

The equivalence point in a titration is the stage at which the amount of titrant added is exactly enough to completely react with the analyte according to the stoichiometric ratios defined by the balanced chemical equation, thereby allowing for quantitative analysis.

Stoichiometry

Stoichiometry involves using the balanced chemical equation to relate the quantities of reactants and products in a chemical reaction, enabling the calculation of the amount of one substance given the amount of another through mole ratios.

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