Write the empirical formula for at least four ionic compounds that could be formed from the following ions: Fe2*, CN¯, NH", BrO,

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Atoms, Ions and Molecules: Predicting the Formula of Ionic Compounds with Common Ions**

**Task:**

Write the empirical formula for at least four ionic compounds that could be formed from the following ions:

\[ \text{Fe}^{2+}, \ \text{CN}^-, \ \text{NH}_4^+, \ \text{BrO}_3^- \]

[Interactive Box for Input]

**Instructions to Students:**

- Identify the possible combinations of cations and anions from the given ions.
- Ensure that the overall charge of the compound is neutral by balancing the charges of the ions correctly.
- Enter at least four different empirical formulas that represent the combinations of the provided ions.

**Example:**

If pairing \(\text{Fe}^{2+}\) with \(\text{BrO}_3^-\):
\[ (\text{Fe}^{2+})_{1}(\text{BrO}_3^-)_{2} = \text{Fe(BrO}_3\text{)}_2 \]

*Interactive Elements:*
- The empty box allows students to input their empirical formulas.
- The box on the right shows options that can be used to reset (\(\times\)), to undo an entry (curved arrow), or to get help (?).

**Note:**

Carefully check the oxidation states and ensure that the total charge of the resulting ionic compound is zero to validate the correctness of the formula.
Transcribed Image Text:**Atoms, Ions and Molecules: Predicting the Formula of Ionic Compounds with Common Ions** **Task:** Write the empirical formula for at least four ionic compounds that could be formed from the following ions: \[ \text{Fe}^{2+}, \ \text{CN}^-, \ \text{NH}_4^+, \ \text{BrO}_3^- \] [Interactive Box for Input] **Instructions to Students:** - Identify the possible combinations of cations and anions from the given ions. - Ensure that the overall charge of the compound is neutral by balancing the charges of the ions correctly. - Enter at least four different empirical formulas that represent the combinations of the provided ions. **Example:** If pairing \(\text{Fe}^{2+}\) with \(\text{BrO}_3^-\): \[ (\text{Fe}^{2+})_{1}(\text{BrO}_3^-)_{2} = \text{Fe(BrO}_3\text{)}_2 \] *Interactive Elements:* - The empty box allows students to input their empirical formulas. - The box on the right shows options that can be used to reset (\(\times\)), to undo an entry (curved arrow), or to get help (?). **Note:** Carefully check the oxidation states and ensure that the total charge of the resulting ionic compound is zero to validate the correctness of the formula.
### Predicting the Formula of Ionic Compounds with Common Ions

#### Understanding Charges and Ionic Compounds

When predicting the formula of ionic compounds, it's essential to consider the charges of the ions involved. For instance, Fe\(^{3+}\) represents an iron ion with a positive charge of +3, and MnO\(_4^{-}\) represents a permanganate ion with a negative charge of -1. To form a neutral compound, the total positive charge must balance the total negative charge. Therefore, the formula of the resulting compound can be predicted based on this balance.

#### Example: Predicting the Formula

Given:

- One MnO\(_4^{-}\) anion with charge \(-1\)
- Iron ion Fe\(^{3+}\) with charge \(+3\)
- Ammonium ion NH\(_4^{+}\) with charge \(+1\)

By balancing the charges to achieve a net charge of 0, we can predict the combinations of other ions to form neutral compounds.

#### Table of Ions Combinations

The table below shows the possible combinations of ions and the resulting compounds:

|               | CH<sub>3</sub>CO<sub>2</sub><sup>&minus;</sup> | MnO<sub>4</sub><sup>&minus;</sup> |
|---------------|-----------------------------------------------|-----------------------------------|
| Fe<sup>3+</sup> | Fe(CH<sub>3</sub>CO<sub>2</sub>)<sub>3</sub>  | Fe(MnO<sub>4</sub>)<sub>3</sub>   |
| NH<sub>4</sub><sup>+</sup>  | NH<sub>4</sub>CH<sub>3</sub>CO<sub>2</sub>           | NH<sub>4</sub>MnO<sub>4</sub>    |

**Explanation of the Table:**

- **Top Row:** Lists the anions (negatively charged ions) used in the combinations.
- **First Column:** Lists the cations (positively charged ions).

Each cell shows the empirical formula of the compound formed by combining the ions from the respective row and column.

#### Resulting Empirical Formulae

From the table, the empirical formulae of the four possible ionic compounds are:
- Fe(CH<sub>3</sub>CO<
Transcribed Image Text:### Predicting the Formula of Ionic Compounds with Common Ions #### Understanding Charges and Ionic Compounds When predicting the formula of ionic compounds, it's essential to consider the charges of the ions involved. For instance, Fe\(^{3+}\) represents an iron ion with a positive charge of +3, and MnO\(_4^{-}\) represents a permanganate ion with a negative charge of -1. To form a neutral compound, the total positive charge must balance the total negative charge. Therefore, the formula of the resulting compound can be predicted based on this balance. #### Example: Predicting the Formula Given: - One MnO\(_4^{-}\) anion with charge \(-1\) - Iron ion Fe\(^{3+}\) with charge \(+3\) - Ammonium ion NH\(_4^{+}\) with charge \(+1\) By balancing the charges to achieve a net charge of 0, we can predict the combinations of other ions to form neutral compounds. #### Table of Ions Combinations The table below shows the possible combinations of ions and the resulting compounds: | | CH<sub>3</sub>CO<sub>2</sub><sup>&minus;</sup> | MnO<sub>4</sub><sup>&minus;</sup> | |---------------|-----------------------------------------------|-----------------------------------| | Fe<sup>3+</sup> | Fe(CH<sub>3</sub>CO<sub>2</sub>)<sub>3</sub> | Fe(MnO<sub>4</sub>)<sub>3</sub> | | NH<sub>4</sub><sup>+</sup> | NH<sub>4</sub>CH<sub>3</sub>CO<sub>2</sub> | NH<sub>4</sub>MnO<sub>4</sub> | **Explanation of the Table:** - **Top Row:** Lists the anions (negatively charged ions) used in the combinations. - **First Column:** Lists the cations (positively charged ions). Each cell shows the empirical formula of the compound formed by combining the ions from the respective row and column. #### Resulting Empirical Formulae From the table, the empirical formulae of the four possible ionic compounds are: - Fe(CH<sub>3</sub>CO<
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