One method of determining the concentration of hydrogen peroxide (H₂O₂) in a solution is through titration with the iodide ion. The net ionic equation for this reaction is H₂O₂ + 2I^- +2H⁺ $\rarr$ I₂ + 2H₂O
A 50.00 mL sample of a hydrogen peroxide solution is found to react completely with 37.12 mL of a 0.1500 M KI solution. What is the concentration of hydrogen peroxide in the sample

Question

One method of determining the concentration of hydrogen peroxide (H₂O₂) in a solution is through titration with the iodide ion. The net ionic equation for this reaction is H₂O₂ + 2I^- +2H⁺

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I₂ + 2H₂O
A 50.00 mL sample of a hydrogen peroxide solution is found to react completely with 37.12 mL of a 0.1500 M KI solution. What is the concentration of hydrogen peroxide in the sample

Quizplus · Accepted Answer

The balanced chemical equation is:H₂O₂ + 2I^- +2H⁺ → I₂ + 2H₂OFrom the stoichiometry of the balanced chemical equation, we can see that 1 mole of H₂O₂ reacts with 2 moles of I^-. Therefore, the number of moles of H₂O₂ in the 50.00 mL sample is:(37.12 mL)(0.1500 M KI)(1 mol H₂O₂/2 mol KI) = 2.784 * 10^-3 mol H₂O₂The concentration of H₂O₂ in the sample is:(2.784 * 10^-3 mol H₂O₂)/(50.00 mL) = 5.568 * 10^-2 MTherefore, the correct answer is A.

One Method of Determining the Concentration of Hydrogen Peroxide (H2O2) →\rarr→

One Method of Determining the Concentration of Hydrogen Peroxide (H₂O₂) $\rarr$