Asked by Sarah
Commercial aqueous hydrogen peroxide was diluted 150 times. 25cm3 of the sample solution was titrated with 0.02molar KMnO4 and 26.3cm3 was required to reach the end point. Calculate the molar concentration of hydrogen peroxide
Answers
Answered by
DrBob222
2MnO4^- + 5H2O2 + 6H^+ ==>2Mn^2+ + 5O2 + 8H2O
Check that equation.
mols MnO4^- = M x L = approx 0.0005 but you must redo this to obtain a better answer.
Using the coefficients in the balanced equation, convert mols MnO4^- to mols H2O2. That will be approx 0.0005 x (5 mols H2O2/2 mols MnO4^-) = ??
Then M H2O2 = mols H2O2/L H2O2 = ??mols H2O2/0.025L = ?
Then multiply the final number you have by 150 to find the concn of the original commercial H2O2.
Post your work if you get stuck.
Check that equation.
mols MnO4^- = M x L = approx 0.0005 but you must redo this to obtain a better answer.
Using the coefficients in the balanced equation, convert mols MnO4^- to mols H2O2. That will be approx 0.0005 x (5 mols H2O2/2 mols MnO4^-) = ??
Then M H2O2 = mols H2O2/L H2O2 = ??mols H2O2/0.025L = ?
Then multiply the final number you have by 150 to find the concn of the original commercial H2O2.
Post your work if you get stuck.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.