DP Chemistry (first assessment 2025)

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Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.6—The oxidation state is a number assigned to an atom to show the number of electrons transferred in forming a bond. It is the charge that atom would have if the compound were composed of ions. Deduce the oxidation states of an atom in an ion or a compound.

Structure 3.1.6—The oxidation state is a number assigned to an atom to show the number of electrons transferred in forming a bond. It is the charge that atom would have if the compound were composed of ions. Deduce the oxidation states of an atom in an ion or a compound.

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Directly related questions

19M.1A.HL.TZ2.8:
What is the oxidation state of the metal ion and charge of the complex ion in [Co(NH₃)₄Cl₂]Cl?
19M.1A.HL.TZ2.8:
What is the oxidation state of the metal ion and charge of the complex ion in [Co(NH₃)₄Cl₂]Cl?
19M.1A.HL.TZ2.8:
What is the oxidation state of the metal ion and charge of the complex ion in [Co(NH₃)₄Cl₂]Cl?
19M.1A.HL.TZ2.8:
What is the oxidation state of the metal ion and charge of the complex ion in [Co(NH₃)₄Cl₂]Cl?
19M.1A.SL.TZ2.21: Which species contains nitrogen with the highest oxidation state? A. NO3− B. NO2− C. NO2 D. N2O
19M.1A.SL.TZ2.21: Which species contains nitrogen with the highest oxidation state? A. NO3− B. NO2− C. NO2 D. N2O
19M.1A.SL.TZ2.21: Which species contains nitrogen with the highest oxidation state? A. NO3− B. NO2− C. NO2 D. N2O
19M.1A.SL.TZ2.21: Which species contains nitrogen with the highest oxidation state? A. NO3− B. NO2− C. NO2 D. N2O
19N.1B.SL.TZ0.2a(iii): List the three products at the anode from the least to the most oxidized.
19N.1B.SL.TZ0.a(iii): List the three products at the anode from the least to the most oxidized.
19N.1B.SL.TZ0.2a(iii): List the three products at the anode from the least to the most oxidized.
19N.1B.SL.TZ0.a(iii): List the three products at the anode from the least to the most oxidized.
21M.1A.SL.TZ2.21: What is the oxidation state of oxygen in H2O2? A. −2 B. −1 C. +1 D. +2
21M.1A.SL.TZ2.21: What is the oxidation state of oxygen in H2O2? A. −2 B. −1 C. +1 D. +2
21M.1A.SL.TZ2.21: What is the oxidation state of oxygen in H2O2? A. −2 B. −1 C. +1 D. +2
21M.1A.SL.TZ2.21: What is the oxidation state of oxygen in H2O2? A. −2 B. −1 C. +1 D. +2
21N.1A.HL.TZ0.8:
Which complex ion contains a central ion with an oxidation state of +3?

A. [PtCl₆]²⁻

B. [Cu(H₂O)₄(OH)₂]

C. [Ni(NH₃)₄(H₂O)₂]²⁺

D. [Co(NH₃)₄Cl₂]⁺
21N.1A.HL.TZ0.8:
Which complex ion contains a central ion with an oxidation state of +3?

A. [PtCl₆]²⁻

B. [Cu(H₂O)₄(OH)₂]

C. [Ni(NH₃)₄(H₂O)₂]²⁺

D. [Co(NH₃)₄Cl₂]⁺
21N.1A.HL.TZ0.8:
Which complex ion contains a central ion with an oxidation state of +3?

A. [PtCl₆]²⁻

B. [Cu(H₂O)₄(OH)₂]

C. [Ni(NH₃)₄(H₂O)₂]²⁺

D. [Co(NH₃)₄Cl₂]⁺
21N.1A.HL.TZ0.8:
Which complex ion contains a central ion with an oxidation state of +3?

A. [PtCl₆]²⁻

B. [Cu(H₂O)₄(OH)₂]

C. [Ni(NH₃)₄(H₂O)₂]²⁺

D. [Co(NH₃)₄Cl₂]⁺
22M.1A.SL.TZ2.11:
What is the name of the compound with formula Ti₃(PO₄)₂?

A. Titanium phosphate

B. Titanium(II) phosphate

C. Titanium(III) phosphate

D. Titanium(IV) phosphate
22M.1A.SL.TZ2.11:
What is the name of the compound with formula Ti₃(PO₄)₂?

A. Titanium phosphate

B. Titanium(II) phosphate

C. Titanium(III) phosphate

D. Titanium(IV) phosphate
22M.1A.SL.TZ2.11:
What is the name of the compound with formula Ti₃(PO₄)₂?

A. Titanium phosphate

B. Titanium(II) phosphate

C. Titanium(III) phosphate

D. Titanium(IV) phosphate
22M.1A.SL.TZ2.11:
What is the name of the compound with formula Ti₃(PO₄)₂?

A. Titanium phosphate

B. Titanium(II) phosphate

C. Titanium(III) phosphate

D. Titanium(IV) phosphate
22M.2.SL.TZ2.5b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
22M.2.SL.TZ2.5b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
22M.2.SL.TZ2.b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
22M.2.SL.TZ2.5b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
22M.2.SL.TZ2.5b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
22M.2.SL.TZ2.b:
Calculate the oxidation state of sulfur in iron(II) disulfide, FeS₂.
19M.2.SL.TZ2.4e(i):
Suggest why the existence of salts containing an ion with this formula could be predicted. Refer to section 7 of the data booklet.
19M.2.SL.TZ2.4e(i):
Suggest why the existence of salts containing an ion with this formula could be predicted. Refer to section 7 of the data booklet.
19M.2.SL.TZ2.e(i):
Suggest why the existence of salts containing an ion with this formula could be predicted. Refer to section 7 of the data booklet.

Sub sections and their related questions

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