🧪K3[Fe(CN)6]
Kaliy geksatsianoferrat(III) • Qizil qon tuzi • M = 329.244 g/mol • CAS: 13746-66-2
Kristall: monoklinik (P2₁/c) • ρ = 1.89 g/cm³ • Paramagnit (d⁵, low-spin, S=1/2)
📖 Birikma haqida ilmiy ma'lumot
Tuzilish va Xossalar
- • [Fe(CN)₆]³⁻ — oktaedrik kompleks
- • Fe³⁺ markazda, d⁵ past-spin
- • Paramagnit (1 ta juftlashmagan elektron)
- • Rang: to'q qizil
- • Suvda eruvchanlik: 464 g/L (20°C)
- • Kuchli oksidlovchi agent
EA Tahlili Xususiyatlari
- ✓ Suvsiz birikma (%H nazariy = 0)
- ✓ Eksperimental %H faqat namlikni ko'rsatadi
- ✓ Yuqori azot miqdori (~25.5%)
- ✓ Termik stabil 250°C gacha
- ⚠️ Yorug'lik sezgir (qorong'uda saqlash)
- ⚠️ Kislota bilan HCN ajratadi!
Qo'llanilishi
- • Analitik kimyo: titrlash standarti
- • Fotografiya: oqartiruvchi
- • Metallurgiya: po'latni qotirish
- • Organik sintez: yumshoq oksidlovchi
- • Elektrokimyo: redoks mediator
📐 Nazariy element tarkibi
| Element | Atomlar | Aᵣ | Massa | Nazariy % | Manba | Vizual |
|---|---|---|---|---|---|---|
| C | 6 | 12.011 | 72.066 | 21.888% | 6×CN⁻ | |
| N | 6 | 14.007 | 84.042 | 25.526% | 6×CN⁻ | |
| Fe | 1 | 55.845 | 55.845 | 16.962% | Markaz | |
| K | 3 | 39.098 | 117.295 | 35.626% | 3×K⁺ | |
| JAMI | 16 | 329.244 | 100.000% | Σ checksum ✓ |
🥧 Element tarkibi vizualizatsiyasi
C6×CN⁻21.888%
N6×CN⁻25.526%
FeMarkaz16.962%
K3×K⁺35.626%
📊 Farq: K₄[Fe(CN)₆]·3H₂O dan farqli o'laroq, bu birikmada H va O yo'q. Azot miqdori yuqoriroq (25.5% vs 19.9%).
🔥 Termogravimetrik analiz (TGA)
K₃[Fe(CN)₆] termik barqarorligi. Suvsiz birikma bo'lgani uchun 250°C gacha massa yo'qotilmaydi.
Joriy holat (25–250°C):
Termik stabil zona (suvsiz)
Δm = −0.0%
Bosqichlar:
#125–250°C−0%
#2250–300°C−5.2%
#3300–450°C−28.5%
#4450–600°C−15.3%
#5600–800°C−10%
🔬 Eksperimental natijalar (n = 5)
Joriy run: 2024-05-10 (A.Karimov)
| El | Nazariy | Eksp | Δ | Holat |
|---|---|---|---|---|
| C | 21.888 | 21.92 | 0.032 | A'lo |
| H | 0.000 | 0.08 | 0.08 | Toza |
| N | 25.526 | 25.48 | 0.046 | A'lo |
| Recovery | 99.85% | 98-102% |
📊 Statistik tahlil (n = 5)
| Parametr | C | H | N |
|---|---|---|---|
| x̄ (o'rtacha) | 21.900 | 0.070 | 25.502 |
| s (st.og'ish) | 0.038 | 0.032 | 0.040 |
| RSD % | 0.17 | 45.18 | 0.16 |
💡 Eslatma: %H uchun RSD yuqori bo'lishi normal, chunki qiymatlar nolga yaqin va asosan namlikka bog'liq. C va N barqaror.
✅
Δ_max(C,N) = 0.046% → A'LO
%H alohida baholanadi (namlik indikatori sifatida).
🧬 Empirik formula qayta tiklash
Hisoblangan empirik formula:
C1N1
Kutilgan: C₆N₆ (Fe va K hisobga olinmaydi)
⚠️ Tafovut bor. %H > 0 bo'lsa, namlik mavjud.
🧮 O'z natijangizni tekshiring
C: Naz 21.888 | Eksp 21.90Δ=0.012%
H: Naz 0.000 | Eksp 0.05Namlik: 0.05%
N: Naz 25.526 | Eksp 25.50Δ=0.026%
✅A'LO
📚 Adabiyot bilan solishtirish
| Manba | %C | %H | %N | Izoh |
|---|---|---|---|---|
| 📐 Nazariy | 21.888 | 0.000 | 25.526 | IUPAC 2021 |
| Greenwood & Earnshaw, 1997 | 21.89 | 0.00 | 25.53 | Chemistry of the Elements, 2nd Ed. |
| Merck Index, 15th Ed. | 21.88 | 0.00 | 25.52 | Monograph 7842 |
| Sigma-Aldrich CoA | 21.91 | 0.05 | 25.49 | ACS reagent ≥99.0% |
| Sharpe, 1976 | 21.89 | 0.00 | 25.53 | The Chemistry of Cyano Complexes |
📜 Tahlil sertifikati (CoA)
Certificate of Analysis — K₃[Fe(CN)₆]
Sertifikat №:
EA-K3FCN-288620
| Birikma: | K3[Fe(CN)6] |
| CAS №: | 13746-66-2 |
| M (g/mol): | 329.244 |
| Tahlil sanasi: | 2024-05-10 |
| Operator: | A.Karimov |
| El | Naz % | Topildi % | Δ % |
|---|---|---|---|
| C | 21.89 | 21.92 | 0.032 |
| H | 0.00 | 0.08 | 0.080 |
| N | 25.53 | 25.48 | 0.046 |
✅ TASDIQLANDIΔ_max = 0.046%