titration experiment level 4

• High School
• You don't have any recent items yet.
• You don't have any courses yet.
• You don't have any books yet.
• You don't have any Studylists yet.
• Information

Titration level 4 labnotebook

General chemistry ll (chem 109), university of wisconsin-eau claire, students also viewed.

• Scheufele 2014 Science Communication as Political Communication
• Psychological Disorders Guide
• Macro Economics Homework #6
• Restricted Stock - Lecture Notes
• Non Marketable Security
• Bearer Instrument - Lecture Notes

Related documents

• Registered Security - Lecture Notes
• Hybrid Security - Lecture Notes
• CHEMll-Notes 2 - These are some helpful notes and practice problems in general chemistry ll
• CHEMll-Chapter 18 - These are some helpful lecture notes and practice problems in general chemistry
• CHEMll-Chapter 17 - These are some helpful lecture notes and practice problems in general chemistry
• CHEMll- Chapter 16 - These are some helpful lecture notes and practice problems in general chemistry

Preview text

Titration level 4.

In level 4, you'll analyse iron tablets to find out whether they contain the correct amount of iron. You'll perform titration experiments to work out the concentration of iron in the tablets.

In each activity you'll be able to collect points. At the end of the level you can restart to improve your skills.

Video 100 Points

Comprehension 90 points 2 attempts.

In a redox reaction both a reduction and an oxidation reaction occur. When a species is reduced it gains electrons. Potassium permanganate is a strong oxidising reagent. The oxidation number decreases as you add electrons.

The presence of excess MnO4- ions act as an indicator in the redox titration because they turn the solution pink at the end-point.

Balancing equations 90 Points

MnO4-(aq) + 5Fe2+(aq) + 8H+(aq) Mn2+(aq) + 5Fe3+(aq) + 4H 2 O(l)

Number of iron tablets required: 10.

Iron tablet preparation 100 Points

250 cm 3 iron II solution prepared. First you ground 10 iron tablets to a fine powder. Then you dissolved the powdered iron tablets in distilled water and transferred the solution to a volumetric flask. You then made the solution up to 250 cm 3.

Preparing for titration 100 Points 1 Attempt

Iron solution added to the flask: 25 cm 3

First you rinsed the pipette with iron solution. Then you transferred 25 cm 3 of the solution into a conical flask.

Burette setup 100 Points 1 Attempt

Burette setup First you rinsed the burette with distilled water and then you rinsed it with the potassium permanganate solution. You then filled the burette with the potassium permanganate solution. Then you removed the funnel. Finally the burette was filled below the tap by running out some solution.

Titration experiment 60 Points

Trial 1st accurate titration

2nd accurate titration

3rd accurate titration Final reading (cm 3 ) 30 30 28 27. Initial reading (cm 3 ) 11 11 9 8. Volume added (cm 3 ) 18 18 19 19. Mean titre (cm 3 ) 19.

The results of the trial and 1st accurate titration were excluded from the average volume calculation.

Average volume added: 19 cm 3.

• Multiple Choice

Course : General Chemistry ll (CHEM 109)

University : university of wisconsin-eau claire.

• More from: General Chemistry ll CHEM 109 University of Wisconsin-Eau Claire 11   Documents Go to course