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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

3. Chemical Reactions

Polyatomic Ions

General Chemistry

3. Chemical Reactions

Polyatomic Ions

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Multiple Choice

The formula for the sulfate ion, SO₄^2–. If the term of 'thio' means the replacement of an oxygen by a sulfur, what is the formula for the thiosulfate ion?

SO₄^3-

SO₃^3-

SO₃^2-

S₂O₃^2-

S₂O₃^-

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Verified step by step guidance

Understand the term 'thio': In chemistry, 'thio' indicates the replacement of an oxygen atom with a sulfur atom in a compound.

Start with the sulfate ion formula: The sulfate ion is represented as \( \text{SO}_4^{2-} \).

Apply the 'thio' concept: Replace one oxygen atom in \( \text{SO}_4^{2-} \) with a sulfur atom. This changes the formula to \( \text{S}_2\text{O}_3^{2-} \).

Check the charge: The charge of the ion remains the same, \( 2- \), because the replacement of an oxygen atom with a sulfur atom does not affect the overall charge.

Verify the new formula: The thiosulfate ion is correctly represented as \( \text{S}_2\text{O}_3^{2-} \), which matches the given correct answer.