التحقق من سلسلة النشاط

اختبار تفاعلية المعادن بتفاعلات الإحلال

Electrochemistry Beginner (Middle School) 30 دقيقة ~$12,00

الهدف

التحقق من سلسلة النشاط الكيميائي الكهربائي باختبار ما إذا كانت المعادن قادرة على إحلال معادن أخرى من محلول.

الخلفية

A more reactive (more easily oxidized) metal will displace a less reactive metal from its salt solution. By testing multiple combinations, students can experimentally construct the activity series: Zn > Fe > Cu > Ag.

تحذيرات السلامة

  • Silver nitrate stains skin permanently
  • Copper sulfate is toxic
  • Wear gloves when handling solutions

معدات الوقاية الشخصية المطلوبة

goggles gloves lab_coat

المواد

  • Zinc strips (3 pieces)
    Small pieces
  • Iron nails (3)
    Clean steel nails
  • Copper strips (3 pieces)
  • Copper(II) sulfate solution (50 mL)
    0.1M
  • Iron(II) sulfate solution (50 mL)
    0.1M
  • Zinc sulfate solution (50 mL)
    0.1M
  • Silver nitrate solution (30 mL)
    0.1M

المعدات

Test tubes and rack Sandpaper Forceps Timer

الإجراء

1

Sand all metal pieces until shiny to remove oxide layers.

3 دقيقة
2

Place 10 mL of each metal salt solution into labeled test tubes. You need: CuSO₄, FeSO₄, ZnSO₄, and AgNO₃.

3 دقيقة Wear gloves
3

Test zinc in CuSO₄ solution. Observe for 5 minutes and record changes on the metal and in the solution.

5 دقيقة
4

Test iron in CuSO₄ solution. Observe and record.

5 دقيقة
5

Test copper in ZnSO₄ solution. Observe and record (expect no reaction).

5 دقيقة
6

Test copper in AgNO₃ solution. Observe silver crystals forming on the copper.

5 دقيقة
7

Compile results into a reactivity table and rank the metals from most to least reactive.

4 دقيقة

النتائج المتوقعة

Zinc displaces copper (blue solution fades, copper deposits on zinc). Iron displaces copper (blue fades slower). Copper does not displace zinc. Copper displaces silver (silver crystals grow). Order: Zn > Fe > Cu > Ag.

التنظيف

Collect silver waste separately in heavy metal container. Dispose of copper waste properly. Rinse metal pieces and test tubes.

Frequently Asked Questions

What is the objective of التحقق من سلسلة النشاط?
التحقق من سلسلة النشاط الكيميائي الكهربائي باختبار ما إذا كانت المعادن قادرة على إحلال معادن أخرى من محلول.
How difficult is التحقق من سلسلة النشاط?
This experiment is rated as Beginner (Middle School). It takes approximately 30 minutes to complete.
What safety precautions are needed for التحقق من سلسلة النشاط?
Key safety precautions include: Silver nitrate stains skin permanently; Copper sulfate is toxic; Wear gloves when handling solutions.
What materials are needed for التحقق من سلسلة النشاط?
The main materials required are: Zinc strips, Iron nails, Copper strips, Copper(II) sulfate solution, Iron(II) sulfate solution.
What results should I expect from التحقق من سلسلة النشاط?
Zinc displaces copper (blue solution fades, copper deposits on zinc). Iron displaces copper (blue fades slower). Copper does not displace zinc. Copper displaces silver (silver crystals grow). Order: Zn > Fe > Cu > Ag.