लिथियम ज्वाला परीक्षण

क्रिमसन-लाल ज्वाला से लिथियम की पहचान

Flame Tests Beginner (Middle School) 15 मिनट ~$8.00

उद्देश्य

लिथियम आयनों द्वारा उत्पन्न विशिष्ट क्रिमसन-लाल ज्वाला रंग का अवलोकन करें, और इसे अन्य क्षार धातु ज्वाला परीक्षणों से तुलना करें।

पृष्ठभूमि

Lithium produces a distinctive crimson-red flame when heated. The emission occurs primarily at 670.8 nm as the excited 2s electron returns to the ground state. Lithium compounds were historically used to produce red colors in fireworks before the introduction of strontium-based alternatives.

सुरक्षा चेतावनियाँ

  • Wear safety goggles at all times
  • Keep hair tied back near open flames
  • Handle HCl with care

आवश्यक PPE

goggles lab_coat

सामग्री

  • Lithium chloride (LiCl) (1 g)
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Distilled water (50 mL)
    For cleaning

उपकरण

Bunsen burner Nichrome wire loop Watch glass Forceps

प्रक्रिया

1

Clean the nichrome wire by dipping in HCl and heating until no color is visible in the flame.

2 मिनट
2

Place a small amount of lithium chloride on the watch glass.

1 मिनट
3

Dip the clean wire into HCl, then touch it to the lithium chloride sample.

1 मिनट
4

Hold the wire in the Bunsen burner flame and observe the characteristic crimson-red color.

2 मिनट Keep face away from flame
5

Record observations and compare with the sodium flame test if already performed.

1 मिनट

अपेक्षित परिणाम

A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).

सफाई

Clean the wire loop with HCl. Dispose of chemicals per lab protocol.

विवरण

श्रेणी
Flame Tests
कठिनाई
Beginner (Middle School)
अवधि
15 मिनट
अनुमानित लागत
$8.00
चरण
5
सामग्री
3

अधिक प्रयोग

कैल्शियम ज्वाला परीक्षण 15 min ज्वाला परीक्षण तुलना प्रयोगशाला 45 min तांबा ज्वाला परीक्षण 15 min पोटेशियम ज्वाला परीक्षण 20 min बेरियम ज्वाला परीक्षण 20 min सोडियम ज्वाला परीक्षण 15 min स्ट्रोंटियम ज्वाला परीक्षण 15 min

Frequently Asked Questions

What is the objective of लिथियम ज्वाला परीक्षण?
लिथियम आयनों द्वारा उत्पन्न विशिष्ट क्रिमसन-लाल ज्वाला रंग का अवलोकन करें, और इसे अन्य क्षार धातु ज्वाला परीक्षणों से तुलना करें।
How difficult is लिथियम ज्वाला परीक्षण?
This experiment is rated as Beginner (Middle School). It takes approximately 15 minutes to complete.
What safety precautions are needed for लिथियम ज्वाला परीक्षण?
Key safety precautions include: Wear safety goggles at all times; Keep hair tied back near open flames; Handle HCl with care.
What materials are needed for लिथियम ज्वाला परीक्षण?
The main materials required are: Lithium chloride (LiCl), Hydrochloric acid (HCl), Distilled water.
What results should I expect from लिथियम ज्वाला परीक्षण?
A bright crimson-red flame should appear. The color is distinct from the red produced by strontium (which is more scarlet) and potassium (which is lilac/violet).