Konduktometrik Titrasyon

Elektrik iletkenliğini kullanarak titrasyonu izleme

Titrations Advanced (University) 50 dak ~$20,00

Hedef

İndikatör yerine iletkenlik ölçümleri kullanarak asit-baz titrasyonu gerçekleştirmek ve eşdeğerlik noktasını iletkenlik-hacim grafiğinden belirlemek.

Arka Plan

In a conductometric titration, electrical conductivity of the solution is measured as the titrant is added. Since different ions have different molar conductivities (H+ and OH- are exceptionally mobile), the conductivity changes non-linearly during titration. The endpoint is found where two straight-line segments of the conductivity curve intersect.

Güvenlik Uyarıları

  • HCl and NaOH are corrosive
  • Wear safety goggles and gloves
  • Keep the conductivity probe away from the magnetic stirrer bar

Gerekli KKD

goggles gloves lab_coat

Malzemeler

  • Hydrochloric acid (HCl) (100 mL)
    0.1M
  • Sodium hydroxide (NaOH) (100 mL)
    0.1M
  • Distilled water (200 mL)

Ekipman

50 mL burette Burette stand and clamp 250 mL beaker Conductivity meter with probe Magnetic stirrer 25 mL pipette Graph paper

Prosedür

1

Pipette 25.0 mL of 0.1M HCl into the beaker. Add 50 mL of distilled water to increase volume for the probe.

3 dak Handle HCl carefully
2

Place the beaker on the magnetic stirrer. Insert the conductivity probe and the stir bar.

2 dak
3

Record the initial conductivity reading. Fill the burette with 0.1M NaOH.

3 dak
4

Add 1.0 mL of NaOH from the burette. Stir for 30 seconds, then record the conductivity and cumulative volume.

2 dak
5

Repeat step 4, adding 1.0 mL increments, recording conductivity after each addition. Continue until well past the expected endpoint.

25 dak
6

Plot conductivity (y-axis) versus volume of NaOH added (x-axis). Identify the two linear regions.

8 dak
7

Draw best-fit lines for the two regions and find their intersection. This is the endpoint.

5 dak

Beklenen Sonuçlar

Conductivity initially decreases as highly mobile H+ ions are replaced by less mobile Na+ ions. After the endpoint, conductivity increases as excess OH- ions accumulate. The V-shaped graph clearly shows the equivalence point.

Temizlik

Remove and rinse the conductivity probe carefully. Neutralize waste solutions before disposal. Rinse all glassware.

Ayrıntılar

Kategori
Titrations
Zorluk
Advanced (University)
Süre
50 dak
Tahmini Maliyet
$20,00
Adımlar
7
Malzemeler
3

Daha Fazla Deney

Antasit Tabletlerinin Geri Titrasyonu 60 min Çamaşır Suyunun İyodometrik Titrasyonu 50 min Çöktürme Titrasyonu (Mohr Yöntemi) 45 min Fenolftaleinli Asit-Baz Titrasyonu 45 min İyot ile C Vitamini Titrasyonu 40 min Karbonat-Bikarbonat Karışımının Çift İndikatörlü Titrasyonu 55 min Metil Turuncusu ile Asit-Baz Titrasyonu 40 min pH Titrasyon Eğrisi 50 min Potasyum Permanganat ile Redoks Titrasyonu 50 min Su Sertliği için EDTA Kompleksometrik Titrasyonu 45 min

Frequently Asked Questions

What is the objective of Konduktometrik Titrasyon?
İndikatör yerine iletkenlik ölçümleri kullanarak asit-baz titrasyonu gerçekleştirmek ve eşdeğerlik noktasını iletkenlik-hacim grafiğinden belirlemek.
How difficult is Konduktometrik Titrasyon?
This experiment is rated as Advanced (University). It takes approximately 50 minutes to complete.
What safety precautions are needed for Konduktometrik Titrasyon?
Key safety precautions include: HCl and NaOH are corrosive; Wear safety goggles and gloves; Keep the conductivity probe away from the magnetic stirrer bar.
What materials are needed for Konduktometrik Titrasyon?
The main materials required are: Hydrochloric acid (HCl), Sodium hydroxide (NaOH), Distilled water.
What results should I expect from Konduktometrik Titrasyon?
Conductivity initially decreases as highly mobile H+ ions are replaced by less mobile Na+ ions. After the endpoint, conductivity increases as excess OH- ions accumulate. The V-shaped graph clearly shows the equivalence point.