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Analysis of the Aluminum Phosphate Compound Question
Önemli Noktalar
- Aluminum phosphate (Al₂(SO₄)₃) formula indicates the compound’s stoichiometry
- The statement about 6 atoms refers to a misunderstanding of counting atoms based on the formula
- The compound contains both ionic and covalent bonds typically: ionic between metal and polyatomic ion, covalent within polyatomic ions
The compound aluminum phosphate is usually represented as AlPO₄, but here given formula Al₂(SO₄)₃ suggests aluminum sulfate. Let’s clarify each statement:
Statement I: “The compound contains 6 atoms.”
The formula Al₂(SO₄)₃ breaks down to:
- Aluminum (Al): 2 atoms
- Sulfur (S): 3 atoms
- Oxygen (O): 4 × 3 = 12 atoms
Total atoms = 2 + 3 + 12 = 17 atoms, not 6 → Statement I is incorrect.
Statement II: “Contains both ionic and covalent bonds.”
- The bond between Al³⁺ ions and sulfate anions (SO₄³⁻) is ionic.
- Within the sulfate ion (SO₄³⁻), bonds are covalent (between S and O).
So the compound indeed has both ionic and covalent bonds → Statement II is correct.
Statement III: “Written as Al₂(SO₄)₃.”
- Aluminum phosphate’s correct formula is AlPO₄, not Al₂(SO₄)₃.
- Al₂(SO₄)₃ is the formula for aluminum sulfate, a different compound.
Therefore, Statement III is incorrect for aluminum phosphate but correct for aluminum sulfate.
Correct interpretation:
- If the question subject is indeed “aluminum phosphate,” the given formula Al₂(SO₄)₃ does not represent it correctly.
- If it mistakenly means aluminum sulfate, then Statement III is correct for aluminum sulfate.
Conclusion:
- For aluminum phosphate, none of the statements (I, II, III) are fully accurate as given.
- For aluminum sulfate (Al₂(SO₄)₃):
- I is false (compound has more than 6 atoms)
- II is true (contains both ionic and covalent bonds)
- III is true (formula matches aluminum sulfate)
Therefore, the correct answer is: II and III.
İçindekiler
- Statement Breakdown and Explanation
- Bond Types in Such Compounds
- Comparison: Aluminum Phosphate vs Aluminum Sulfate
- Özet Tablo
- Sık Sorulan Sorular
Statement Breakdown and Explanation
Statement I: ‘Contains 6 atoms’ counts atoms incorrectly for Al₂(SO₄)₃. Real total atoms: 17. Counting atoms requires multiplying quantity by subscript.
Statement II: Combination of ionic (Al³⁺ with SO₄³⁻) and covalent (inside SO₄) bonds is a standard trait in such salts.
Statement III: The formula Al₂(SO₄)₃ corresponds to aluminum sulfate, not aluminum phosphate. Aluminum phosphate formula is typically AlPO₄, with a different composition.
Warning: Confusing chemical formulas leads to misinterpretation of compound properties.
Bond Types in Such Compounds
- Ionic bonds: Interaction between metal cations (Al³⁺) and polyatomic anions (SO₄³⁻).
- Covalent bonds: Within polyatomic ions like sulfate (S–O bonds).
Pro Tip: Polyatomic ions have covalent bonds internally but form ionic bonds with metal ions in salts.
Comparison: Aluminum Phosphate vs Aluminum Sulfate
| Aspect | Aluminum Phosphate (AlPO₄) | Aluminum Sulfate (Al₂(SO₄)₃) |
|---|---|---|
| Chemical formula | AlPO₄ | Al₂(SO₄)₃ |
| Number of atoms per formula | 6 (1 Al + 1 P + 4 O) | 17 (2 Al + 3 S + 12 O) |
| Ionic bonds present? | Yes (Al and phosphate) | Yes (Al and sulfate) |
| Covalent bonds present? | Yes (P–O in phosphate) | Yes (S–O in sulfate) |
| Common use | Ceramic material, catalyst | Water treatment, paper industry |
Özet Tablo
| Statement | Correct? | Reason |
|---|---|---|
| I (6 atoms) | No | Actual atom count is 17 for Al₂(SO₄)₃ |
| II (Ionic and covalent bonding) | Yes | Ionic between Al³⁺ and SO₄³⁻, covalent within SO₄³⁻ |
| III (Written as Al₂(SO₄)₃) | Yes, but for aluminum sulfate | Not correct for aluminum phosphate; formula corresponds to aluminum sulfate |
Sık Sorulan Sorular
1. Why does Al₂(SO₄)₃ include both ionic and covalent bonds?
The compound consists of aluminum ions (Al³⁺) and sulfate ions (SO₄³⁻). Ionic bonds exist between these ions, while the sulfate ion’s internal bonds between sulfur and oxygen are covalent.
2. How to count atoms correctly in a compound’s formula?
Multiply the atoms in each group by their subscript, then sum all atoms from every element. For example, Al₂(SO₄)₃ means 2 Al, 3 S, and 12 O atoms total.
3. What is the difference between aluminum phosphate and aluminum sulfate?
Aluminum phosphate is AlPO₄, with phosphorus, while aluminum sulfate is Al₂(SO₄)₃, containing sulfur in the sulfate ion. Their properties and uses differ accordingly.
Sonraki Adımlar
Would you like a detailed explanation of how to name polyatomic ionic compounds, including common formulas and bonding types?
Alüminyum fosfat bileşiği ile ilgili doğru ifadeler hangileridir?
- Alüminyum fosfat formülü AlPO_4 şeklindedir.
- Bir formülde toplam 6 atom bulunur (1 Al, 1 P, 4 O).
- İç yapısında hem iyonik (Al³⁺–PO₄³⁻) hem de kovalent (P–O) bağlar vardır.
Doğru cevap: I ve II.
İçindekiler
Cevap Özeti
- I. ifade doğru: $AlPO_4$’te 1 Al + 1 P + 4 O = 6 atom vardır.
- II. ifade doğru: Al–PO₄ çekimi iyonik, P–O bağları kovalenttir.
- III. ifade yanlıştır: Al_2(SO_4)_3 alüminyum sülfat formülüdür, fosfat değil.
Derinlemesine Açıklama
- Formül ve Atom Sayısı
Alüminyum fosfat, bir Al³⁺ iyonu ile bir PO₄³⁻ iyonunun bir araya gelmesiyle oluşur:Al^{3+} + PO_4^{3-} \rightarrow AlPO_4Toplam atom sayısı:1\,(Al) + 1\,(P) + 4\,(O) = 6\text{ atom} - Bağ Türleri
- Al–PO₄³⁻ arasındaki etkileşim iyonik baştır.
- PO₄³⁻ içindeki P–O bağları kovalent yapıdadır.
- Yanlış Formül
Al_2(SO_4)_3 formülü sülfat iyonu (SO₄²⁻) içerir, fosfat (PO₄³⁻) değil.
Karşılaştırma Tablosu
| Özellik | AlPO₄ (Fosfat) | Al₂(SO₄)₃ (Sülfat) |
|---|---|---|
| Formül | AlPO_4 | Al_2(SO_4)_3 |
| Toplam Atom Sayısı | 1+1+4 = 6 | 2+2+12 = 16 |
| İyonik Bağ | Al³⁺–PO₄³⁻ | Al³⁺–SO₄²⁻ |
| Kovalent Bağ | P–O (PO₄ içi) | S–O (SO₄ içi) |
Özet Tablosu
| Madde | Formül | Atom Sayısı | Bağ Türleri |
|---|---|---|---|
| Alüminyum fosfat | AlPO_4 | 6 | İyonik + Kovalent |
SSS
- Alüminyum fosfatın formülü nasıl bulunur?
- Al³⁺ ve PO₄³⁻ iyonları eşit yükle birleşerek AlPO_4 oluşturur.
- İyonik ve kovalent bağ arasındaki temel fark nedir?
- İyonik bağ: yüklü iyonlar arası elektrostatik çekim.
- Kovalent bağ: atomlar arasında elektron paylaşımı.
- Başka bir bileşikte atom sayısı nasıl hesaplanır?
- Formülde yazılı atom sayısını iyon katlarıyla çarparak toplarsınız.
- Al_2(PO_4)_3 formülü neden değil de AlPO_4 tercih edilir?
- Tek bir Al³⁺ ve PO₄³⁻ iyonu dengeli yükle birleşir, fazladan iyon gerektirmez.
Bu konuyla ilgili 3 adet benzer soru çözmek ister misiniz?
@Ayten_Dayan