الطلاء الكهربائي بالنحاس

ترسيب طبقة رقيقة من النحاس على جسم معدني

Electrochemistry Intermediate (High School) 60 دقيقة ~$15,00

الهدف

طلاء مفتاح أو عملة معدنية بالنحاس كهربائياً، مما يوضح العملية الصناعية للترسيب الكهربائي وقوانين فاراداي.

الخلفية

Electroplating uses electrolysis to deposit a thin layer of metal onto a conductive surface. The object to be plated is made the cathode, and the plating metal (copper) is the anode. Copper ions from the solution are reduced and deposited on the cathode surface.

تحذيرات السلامة

  • Copper sulfate solution is toxic
  • Dilute sulfuric acid is corrosive
  • Wear gloves and goggles
  • Handle electrical connections with care

معدات الوقاية الشخصية المطلوبة

goggles gloves lab_coat

المواد

  • Copper(II) sulfate (CuSO₄) (200 mL)
    1M solution
  • Sulfuric acid (H₂SO₄) (10 mL)
    Dilute, to improve conductivity
  • Copper strip or sheet (1 piece)
    Anode
  • Metal key or coin (1)
    Object to plate (cathode)
  • Acetone or alcohol (20 mL)
    For cleaning the object

المعدات

DC power supply (3-6V) Beaker (400 mL) Wires with alligator clips Sandpaper Analytical balance

الإجراء

1

Clean the object (key/coin) by sanding lightly and degreasing with acetone. A clean surface is critical for good plating.

5 دقيقة Acetone is flammable
2

Weigh the clean object on the analytical balance and record the mass.

2 دقيقة
3

Prepare the plating solution: 200 mL of 1M CuSO₄ with 5 mL of dilute H₂SO₄.

3 دقيقة Wear gloves
4

Suspend the copper strip (anode) and the object (cathode) in the solution, connected to the power supply.

5 دقيقة
5

Set the power supply to 3V and turn it on. Observe the copper being deposited on the cathode.

2 دقيقة
6

Allow plating to continue for 30 minutes. Periodically check that gas bubbles are minimal (indicates correct voltage).

30 دقيقة
7

Turn off the power supply. Remove the plated object, rinse with water, and dry gently.

3 دقيقة
8

Weigh the plated object. Calculate the mass of copper deposited and compare with Faraday's law prediction.

5 دقيقة

النتائج المتوقعة

A smooth, shiny copper coating should cover the object. The mass increase should correlate with Faraday's law: m = (M x I x t) / (n x F), where M is molar mass of Cu, I is current, t is time, n=2, and F is Faraday's constant.

التنظيف

Dispose of copper sulfate solution in heavy metal waste. Rinse all equipment. Clean the copper anode for reuse.

التفاصيل

الفئة
Electrochemistry
الصعوبة
Intermediate (High School)
المدة
60 دقيقة
التكلفة التقديرية
$15,00
الخطوات
8
المواد
5

مزيد من التجارب

التحقق من سلسلة النشاط 30 min بطارية الليمون 20 min بناء خلية دانيال 45 min تحليل الماء الكهربائي 40 min تحليل كبريتات النحاس كهربائياً 50 min خلية التركيز 45 min طرق منع الصدأ 30 min قياس إمكانية الخلية الفولتية 60 min

Frequently Asked Questions

What is the objective of الطلاء الكهربائي بالنحاس?
طلاء مفتاح أو عملة معدنية بالنحاس كهربائياً، مما يوضح العملية الصناعية للترسيب الكهربائي وقوانين فاراداي.
How difficult is الطلاء الكهربائي بالنحاس?
This experiment is rated as Intermediate (High School). It takes approximately 60 minutes to complete.
What safety precautions are needed for الطلاء الكهربائي بالنحاس?
Key safety precautions include: Copper sulfate solution is toxic; Dilute sulfuric acid is corrosive; Wear gloves and goggles.
What materials are needed for الطلاء الكهربائي بالنحاس?
The main materials required are: Copper(II) sulfate (CuSO₄), Sulfuric acid (H₂SO₄), Copper strip or sheet, Metal key or coin, Acetone or alcohol.
What results should I expect from الطلاء الكهربائي بالنحاس?
A smooth, shiny copper coating should cover the object. The mass increase should correlate with Faraday's law: m = (M x I x t) / (n x F), where M is molar mass of Cu, I is current, t is time, n=2, and F is Faraday's constant.