Potasyum Permanganat ile Redoks Titrasyonu

KMnO₄ kullanarak demir(II) konsantrasyonunu belirleme

Titrations Advanced (University) 50 dak ~$18,00

Hedef

Demir(II) sülfat çözeltisinin konsantrasyonunu, öz indikatör olan standartlaştırılmış potasyum permanganat ile titre ederek belirlemek.

Arka Plan

Potassium permanganate is a powerful oxidizing agent that reacts with Fe2+ in acidic solution. MnO4- (purple) is reduced to Mn2+ (nearly colorless), so permanganate acts as its own indicator. The endpoint occurs when a single drop of excess KMnO4 produces a permanent pink/purple color.

Güvenlik Uyarıları

  • KMnO₄ stains skin and clothing permanently
  • H₂SO₄ is corrosive
  • Wear safety goggles and gloves throughout
  • Wipe up KMnO₄ spills immediately

Gerekli KKD

goggles gloves lab_coat

Malzemeler

  • Iron(II) sulfate solution (100 mL)
    Unknown concentration
  • Potassium permanganate (KMnO₄) (100 mL)
    0.02M standardized
  • Sulfuric acid (H₂SO₄) (50 mL)
    1M
  • Distilled water (200 mL)

Ekipman

50 mL burette Burette stand and clamp 250 mL Erlenmeyer flask 25 mL pipette Pipette filler White tile

Prosedür

1

Rinse the burette with KMnO₄ solution, then fill to the 0 mL mark. Record the meniscus reading (read from the top of the meniscus since KMnO₄ is opaque).

5 dak KMnO₄ stains — handle carefully
2

Pipette exactly 25.0 mL of iron(II) sulfate solution into the Erlenmeyer flask.

3 dak
3

Add 10 mL of 1M sulfuric acid to the flask to ensure acidic conditions.

2 dak Handle acid carefully
4

Slowly add KMnO₄ from the burette while swirling. Each drop will decolorize as Fe2+ reduces MnO4-.

10 dak
5

As the endpoint approaches, add drop by drop until a faint permanent pink/purple color persists for 30 seconds.

5 dak
6

Record the final burette reading and calculate the volume used.

2 dak
7

Repeat at least twice for concordant results.

15 dak
8

Calculate the Fe2+ concentration using the balanced equation: MnO4- + 5Fe2+ + 8H+ → Mn2+ + 5Fe3+ + 4H2O.

5 dak

Beklenen Sonuçlar

The solution should transition from colorless to a persistent faint pink/purple at the endpoint. The 1:5 molar ratio of KMnO₄ to Fe2+ should yield an accurate concentration.

Temizlik

Dilute waste solutions and dispose of KMnO₄ waste according to lab protocols. Rinse the burette thoroughly with water. Clean any stains with dilute acid or sodium sulfite.

Ayrıntılar

Kategori
Titrations
Zorluk
Advanced (University)
Süre
50 dak
Tahmini Maliyet
$18,00
Adımlar
8
Malzemeler
4

Daha Fazla Deney

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Frequently Asked Questions

What is the objective of Potasyum Permanganat ile Redoks Titrasyonu?
Demir(II) sülfat çözeltisinin konsantrasyonunu, öz indikatör olan standartlaştırılmış potasyum permanganat ile titre ederek belirlemek.
How difficult is Potasyum Permanganat ile Redoks Titrasyonu?
This experiment is rated as Advanced (University). It takes approximately 50 minutes to complete.
What safety precautions are needed for Potasyum Permanganat ile Redoks Titrasyonu?
Key safety precautions include: KMnO₄ stains skin and clothing permanently; H₂SO₄ is corrosive; Wear safety goggles and gloves throughout.
What materials are needed for Potasyum Permanganat ile Redoks Titrasyonu?
The main materials required are: Iron(II) sulfate solution, Potassium permanganate (KMnO₄), Sulfuric acid (H₂SO₄), Distilled water.
What results should I expect from Potasyum Permanganat ile Redoks Titrasyonu?
The solution should transition from colorless to a persistent faint pink/purple at the endpoint. The 1:5 molar ratio of KMnO₄ to Fe2+ should yield an accurate concentration.