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1. The Chemical World9m
- The Scientific Method
  9m
2. Measurement and Problem Solving2h 19m
3. Matter and Energy2h 15m
4. Atoms and Elements2h 33m
5. Molecules and Compounds1h 50m
6. Chemical Composition1h 23m
7. Chemical Reactions1h 43m
8. Quantities in Chemical Reactions1h 8m
9. Electrons in Atoms and the Periodic Table2h 32m
10. Chemical Bonding2h 10m
11 Gases2h 7m
12. Liquids, Solids, and Intermolecular Forces1h 11m
13. Solutions3h 1m
14. Acids and Bases2h 14m
15. Chemical Equilibrium1h 27m
16. Oxidation and Reduction1h 33m
17. Radioactivity and Nuclear Chemistry53m

5. Molecules and Compounds

Polyatomic Ions

Introduction to Chemistry

5. Molecules and Compounds

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 concept of 'thio': In chemistry, the prefix 'thio-' indicates the replacement of an oxygen atom with a sulfur atom in a compound.

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

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

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

Review the options: Compare the derived formula \( \text{S}_2\text{O}_3^{2-} \) with the given options to confirm the correct answer.