AP CHem, finding concentration of H2O2 by titration

AI Thread Summary
The discussion focuses on determining the concentration of hydrogen peroxide (H2O2) through titration using potassium permanganate (KMnO4) and sulfuric acid (H2SO4). The average titrant volume used was 34.5 mL, with a solution consisting of 5 mL of H2O2 and 65 mL of H2SO4. The calculated concentration of H2O2 was found to be 0.8625 M, which was significantly higher than the expected 0.03 M. Participants suggest converting molarity to percentage and calculating the error to identify discrepancies in the results. The discussion emphasizes the importance of accurate calculations and understanding the chemical reactions involved.
Poly550
Messages
1
Reaction score
0

Homework Statement



I need to find the concentration of the H2O2 that we used

Homework Equations


2KMnO4 + 5H2O2 + 3H2SO4 → 2MnSO4 + 5O2 + 8 H2O + K2SO4 (not sure if correct)

we got an average of 34.5 ml of titrant, for solution we were adding the titrant to being 5ml of Hydrogen peroxide, and 65 ml of H2SO4

.6 m H2SO4
.050 M KMnO4
? M H2O2 (what I am trying to find)

The Attempt at a Solution



.8625 (very high % error, supposed to be .03 If i did it correctly [3 grams per 100ml in a water based solution is .03 right?])I would like to know what I did wrong, and how i could fix it.thank you in advance!
 
Physics news on Phys.org
From the information given 0.8626 M is a correct answer.

Convert M to %, THEN calculate the error.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

[Chemistry] Determine the concentration of h2o2 by redox titration
Replies
5
Views
24K
Balancing Half-Reactions: Determining H2O2 Concentration with KMnO4 Titration
Replies
1
Views
3K
How Do You Calculate NaCH3COO Concentration and Predict pH at Equivalence Point?
Replies
4
Views
3K
Calculating Hydrogen Peroxide Mass Percent in Redox Titration
Replies
2
Views
6K
Determining conc of H2O2 by titration
Replies
6
Views
44K
Standardization of nitrite solution (TITRATION, STUMPED)
Replies
1
Views
16K
Chemistry - titation with old and new H2O2
Replies
5
Views
10K
Solved: Redox Titration Help - Calculate NaOCl Concentration
Replies
9
Views
7K
What Is the Original Concentration of NaOH in the Titration Lab?
Replies
1
Views
2K
Chem Lab Titration: Finding Unknown Molarities
Replies
4
Views
11K

Hot Threads

Recent Insights

Back
Top