पोटेशियम ज्वाला परीक्षण

बैंगनी/नीलम ज्वाला से पोटेशियम की पहचान

Flame Tests Beginner (Middle School) 20 मिनट ~$6.00

उद्देश्य

पोटेशियम आयनों द्वारा उत्पन्न बैंगनी/नीलम ज्वाला रंग का अवलोकन करें, और सोडियम संदूषण से इसे अलग करने के लिए कोबाल्ट नीले कांच का उपयोग करना सीखें।

पृष्ठभूमि

Potassium produces a pale lilac or violet flame when heated. The emission occurs at 766.5 nm and 769.9 nm (near-infrared/deep red doublet). Because the flame is quite faint and easily overwhelmed by sodium's intense yellow, cobalt blue glass is used as a filter to block sodium emission and reveal potassium's true color.

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

  • Potassium chloride (KCl) (1 g)
  • Hydrochloric acid (HCl) (10 mL)
    1M concentration
  • Cobalt blue glass (1 piece)
    For filtering sodium light

उपकरण

Bunsen burner Nichrome wire loop Watch glass Forceps

प्रक्रिया

1

Clean the nichrome wire thoroughly by dipping in HCl and heating.

2 मिनट
2

Place potassium chloride on the watch glass and collect a sample on the clean wire.

1 मिनट
3

Hold the sample in the Bunsen burner flame. Observe with the naked eye first.

2 मिनट
4

Now observe the flame through cobalt blue glass to filter out any sodium contamination.

2 मिनट
5

Record the difference in appearance with and without the cobalt blue glass filter.

2 मिनट

अपेक्षित परिणाम

Without the filter, you may see a faint lilac color possibly masked by yellow from sodium impurities. Through the cobalt blue glass, a clear violet/lilac flame should be visible as the glass absorbs the yellow sodium emission.

सफाई

Clean the wire loop with HCl. Return cobalt blue glass to storage.

विवरण

श्रेणी
Flame Tests
कठिनाई
Beginner (Middle School)
अवधि
20 मिनट
अनुमानित लागत
$6.00
चरण
5
सामग्री
3

अधिक प्रयोग

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

Frequently Asked Questions

What is the objective of पोटेशियम ज्वाला परीक्षण?
पोटेशियम आयनों द्वारा उत्पन्न बैंगनी/नीलम ज्वाला रंग का अवलोकन करें, और सोडियम संदूषण से इसे अलग करने के लिए कोबाल्ट नीले कांच का उपयोग करना सीखें।
How difficult is पोटेशियम ज्वाला परीक्षण?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for पोटेशियम 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 पोटेशियम ज्वाला परीक्षण?
The main materials required are: Potassium chloride (KCl), Hydrochloric acid (HCl), Cobalt blue glass.
What results should I expect from पोटेशियम ज्वाला परीक्षण?
Without the filter, you may see a faint lilac color possibly masked by yellow from sodium impurities. Through the cobalt blue glass, a clear violet/lilac flame should be visible as the glass absorbs the yellow sodium emission.