2) Given the following unbalanced redox equation: Br + Cr₂0₂² →Cr+3+ Br₂ (in acid) In a redox titration 12.38 mL of 0.225 M Cr₂O₂²- was needed to completely oxidize the Br in a 20.00 mL sample of NaBr. Calculate the original [Br]. ans 0.835 mol/L 3) Acidified hydrogen peroxide (H₂O₂) is used to titrate a solution of MnO4 ions of unknown concentration. Two products are O₂ gas and Mn²+. Write the balanced redox equation: It takes 6.50 mL of 0.200 M H₂O₂ to titrate a 25.0 mL sample of MnO4 solution. Calculate the original [MnO4]. ans 0.021 mol/L
2) Given the following unbalanced redox equation: Br + Cr₂0₂² →Cr+3+ Br₂ (in acid) In a redox titration 12.38 mL of 0.225 M Cr₂O₂²- was needed to completely oxidize the Br in a 20.00 mL sample of NaBr. Calculate the original [Br]. ans 0.835 mol/L 3) Acidified hydrogen peroxide (H₂O₂) is used to titrate a solution of MnO4 ions of unknown concentration. Two products are O₂ gas and Mn²+. Write the balanced redox equation: It takes 6.50 mL of 0.200 M H₂O₂ to titrate a 25.0 mL sample of MnO4 solution. Calculate the original [MnO4]. ans 0.021 mol/L
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 79E: In a titration of cyanide ion, 28.72 mL of 0.0100 M AgNO3 is added before precipitation begins. [The...
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Can you please do 2 and 3
![9:09
< Back
notes part 2
MnO₂ + HO₂ MnO4
Zn + NO3] Zn(OH)4² + NH3 Redox titration
problems
1) A solution of Sn(NO3)2 of unknown
concentration can be titrated with a solution of
acidified KMnO4 of known concentration and
the concentration of the Sn(NO3)2 can be
calculated. The unbalanced reaction is...
Sn²+ + MnO4 + H+ → Sn4+ + Mn²+ + H₂O
purple
colourless
If 42.0 mL of Sn(NO3)2 are titrated by 18.0 mL
of 0.15 M KMnO4 then find the [Sn(NO3)₂].
ans 0.16 mol/L
2) Given the following unbalanced redox
equation:
Br + Cr₂O₂²- →→Cr+³ + Br₂ (in acid)
In a redox titration 12.38 mL of 0.225 M Cr₂O₂²-
was needed to completely oxidize the Br in a
20.00 mL sample of NaBr. Calculate the original
[Br].
ans 0.835 mol/L
3) Acidified hydrogen peroxide (H₂O₂) is
used to titrate a solution of MnO4 ions of
unknown concentration. Two products are
O₂ gas and Mn²+.
Write the balanced redox equation:
It takes 6.50 mL of 0.200 M H₂O₂ to titrate a
25.0 mL sample of MnO4 solution.
Calculate the original [MnO4].
ans 0.021 mol/L
Homework from Chapter 4
85, 89, 91, 93, 97, 99](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa7634a6a-5ecc-40e2-9892-46ba7a4cefd4%2Fd7493293-59b9-4cf6-b12f-a38794e70f9c%2F7ynfw0j_processed.jpeg&w=3840&q=75)
Transcribed Image Text:9:09
< Back
notes part 2
MnO₂ + HO₂ MnO4
Zn + NO3] Zn(OH)4² + NH3 Redox titration
problems
1) A solution of Sn(NO3)2 of unknown
concentration can be titrated with a solution of
acidified KMnO4 of known concentration and
the concentration of the Sn(NO3)2 can be
calculated. The unbalanced reaction is...
Sn²+ + MnO4 + H+ → Sn4+ + Mn²+ + H₂O
purple
colourless
If 42.0 mL of Sn(NO3)2 are titrated by 18.0 mL
of 0.15 M KMnO4 then find the [Sn(NO3)₂].
ans 0.16 mol/L
2) Given the following unbalanced redox
equation:
Br + Cr₂O₂²- →→Cr+³ + Br₂ (in acid)
In a redox titration 12.38 mL of 0.225 M Cr₂O₂²-
was needed to completely oxidize the Br in a
20.00 mL sample of NaBr. Calculate the original
[Br].
ans 0.835 mol/L
3) Acidified hydrogen peroxide (H₂O₂) is
used to titrate a solution of MnO4 ions of
unknown concentration. Two products are
O₂ gas and Mn²+.
Write the balanced redox equation:
It takes 6.50 mL of 0.200 M H₂O₂ to titrate a
25.0 mL sample of MnO4 solution.
Calculate the original [MnO4].
ans 0.021 mol/L
Homework from Chapter 4
85, 89, 91, 93, 97, 99
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