Question

22. Calculate the concentration of the OLD hydrogen peroxide, following the steps below. Use your average volume of KMnO4 used as the titrant volume. Answer (4 Marks) AVG KMnO4 Used: 12.7mL Write the half- reactions and net redox reaction between H2O2 and KMnO4 (remember KMnO4 dissociates into K+ and MnO4-) Calculate moles of MnO4- added from the average volume of KMnO4 used Calculate moles of OLD H2O2 Calculate concentration of OLD H2O2 23. Use your calculated concentration of OLD H2O2 and Table 1 on p. 603 in your textbook to estimate the percentage by volume concentration of the OLD hydrogen peroxide solution. (No calculation is needed here.) Answer (1 Mark)

          22. Calculate the concentration of the OLD hydrogen peroxide, following the steps
below. Use your average volume of KMnO4 used as the titrant volume.
Answer (4 Marks) AVG KMnO4 Used: 12.7mL
Write the half-
reactions and
net redox
reaction between
H2O2 and KMnO4
(remember KMnO4
dissociates into K+ and
MnO4-)
Calculate moles
of MnO4- added
from the average
volume of
KMnO4 used
Calculate moles
of OLD H2O2
Calculate
concentration of
OLD H2O2
23. Use your calculated concentration of OLD H2O2 and Table 1 on p. 603 in your
textbook to estimate the percentage by volume concentration of the OLD
hydrogen peroxide solution. (No calculation is needed here.)
Answer (1 Mark)

22. Calculate the concentration of the OLD hydrogen peroxide, following the steps
below. Use your average volume of KMnO4 used as the titrant volume.
Answer (4 Marks) AVG KMnO4 Used: 12.7mL
Write the half-
reactions and
net redox
reaction between
H2O2 and KMnO4
(remember KMnO4
dissociates into K+ and
MnO4-)
Calculate moles
of MnO4- added
from the average
volume of
KMnO4 used
Calculate moles
of OLD H2O2
Calculate
concentration of
OLD H2O2
23. Use your calculated concentration of OLD H2O2 and Table 1 on p. 603 in your
textbook to estimate the percentage by volume concentration of the OLD
hydrogen peroxide solution. (No calculation is needed here.)
Answer (1 Mark)

Added by Shannon C.

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