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Example 1: Determine the formula for manganese (IV) oxide.

Example 1 showing the formula for manganese (IV) oxide, with handwritten steps and chemical notation.

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Show Answer Key & Explanations Step-by-step solution for: Predicting the Formula of Binary Ionic Compounds | Chemistry ...

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1. Identify the ions: Manganese(IV) indicates the Mn⁴⁺ cation. Oxide is the O²⁻ anion.
2. Balance the charges: The total positive charge from cations must equal the total negative charge from anions.
3. Find the least common multiple of the charges: The magnitude of the charges are 4+ and 2-. The LCM of 4 and 2 is 4.
4. Determine the number of each ion needed: To get a total positive charge of 4+, you need one Mn⁴⁺ ion (1 × 4+ = 4+). To get a total negative charge of 4-, you need two O²⁻ ions (2 × 2- = 4-).
5. Write the formula: Combine the ions in the ratio determined, writing the cation first and the anion second. The formula is MnO₂.

Parent Tip: Review the logic above to help your child master the concept of writing binary formulas worksheet.

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