One method of determining the concentration of hydrogen peroxide (H₂O₂) in a solution is through titration with 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 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 correct answer is A because:The balanced chemical equation for the reaction is:H₂O₂ + 2I^- +2H⁺ $\rarr$ I₂ + 2H₂OFrom 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 sample is:moles of H₂O₂ = (37.12 mL * 0.1500 M) / 2 = 2.784 * 10^-3 molThe concentration of H₂O₂ in the sample is:concentration of H₂O₂ = (2.784 * 10^-3 mol) / (50.00 mL * 1 L/1000 mL) = 5.568 * 10^-2 M

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

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