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# hydrogen peroxide with potassium permanganate

Question:We're doing a titration involving sulfuric acid, potassium permanganate, and hydrogen peroxide. One of the questions is "write the balanced redox reaction". However, first I have to write the balanced chemical equation, but I have no idea how to find the product of the reaction (before splitting into ionic form). From what I hear, this 5H2O2 + 2KMnO4 +4H2SO4 -->2KHSO4 + 2MnSO4 + 5O2 +8H2O is the balance chemical equation, but I don't understand how the Manganese can split off from the oxygen and attach to sulfate. I also don't understand why sulfuric acid become KHSO4.

Answers:here is the correct equation nett equation 2MnO4- +5H2O2 + 6H+ = 2Mn2++ 5O2 + 8H2O here are the hal equations MnO4-(aq) + 8H+(aq) + 5e-==> Mn2+(aq) + 4H2O(l) H2O2(aq ==> O2(g) +2H+(aq) + 2e- to get the correct nett equation multiply1 by 2 and 2 by 5 the add balance the H's on both side .. presto !!

Question:5 H2O2(aq) + 2 KMnO4(aq) + 3 H2SO4(aq) 5 O2(g) + 2 MnSO4(aq) + K2SO4(aq) + 8 H2O(l) It requires 40.9 mL of 0.200 M KMnO4 to titrate 20.0 g of the solution of hydrogen peroxide. What is the mass percentage of H2O2 in the solution?

Answers:Moles KMnO4 = 0.0409 L x 0.200 =0.00818 Moles H2O2 = 0.00818 x 5 / 2 =0.0205 Mass H2O2 = 0.0205 mol x 34.0148 g/mol =0.697 g % = 0.697 x 100 / 20.0 =3.49

Question:What is the activation energy of hydrogen peroxide (H2O2) and potassium iodide (KI)?