Fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table:
| cation | anion | empirical formula | name of compound |
|---|---|---|---|
| [tex]K^{+}[/tex] | [tex]BrO_4^{-}[/tex] | [tex]\square[/tex] | [tex]\square[/tex] |
| [tex]Na^{+}[/tex] | [tex]NO_2^{-}[/tex] | [tex]\square[/tex] | [tex]\square[/tex] |
| [tex]K^{+}[/tex] | [tex]BrO^{-}[/tex] | | [tex]\square[/tex] |
Answer (2)
K + and B r O 4 − combine to form K B r O 4 , named potassium perbromate.
N a + and N O 2 − combine to form N a N O 2 , named sodium nitrite.
K + and B r O − combine to form K B r O , named potassium hypobromite.
The empirical formulas and names are determined by balancing the charges of the ions. The final answers are: K B r O 4 , N a N O 2 , K B r O . K B r O 4 , N a N O 2 , K B r O
Explanation
Understanding the Problem We are given a table with cations and anions and need to determine the empirical formula and name of the ionic compound formed by each cation-anion pair. The cations are K + and N a + . The anions are B r O 4 − , N O 2 − , and B r O − . We need to find the empirical formula and name for the following combinations: K + and B r O 4 − , N a + and N O 2 − , and K + and B r O − . The charge of the cation and anion must balance in the empirical formula.
Determining Formula and Name for K + and B r O 4 − For K + and B r O 4 − , since both have a charge of magnitude 1, the empirical formula is K B r O 4 . The name is potassium perbromate.
Determining Formula and Name for N a + and N O 2 − For N a + and N O 2 − , since both have a charge of magnitude 1, the empirical formula is N a N O 2 . The name is sodium nitrite.
Determining Formula and Name for K + and B r O − For K + and B r O − , since both have a charge of magnitude 1, the empirical formula is K B r O . The name is potassium hypobromite.
Final Answer The empirical formulas and names of the ionic compounds are:
K + and B r O 4 − : Empirical formula is K B r O 4 , name is potassium perbromate.
N a + and N O 2 − : Empirical formula is N a N O 2 , name is sodium nitrite.
K + and B r O − : Empirical formula is K B r O , name is potassium hypobromite.
Examples
Ionic compounds are used in various applications in everyday life. For example, sodium chloride (NaCl), commonly known as table salt, is used to season food. Potassium iodide (KI) is added to table salt to prevent iodine deficiency. Calcium carbonate (CaCO3) is found in antacids to neutralize stomach acid. These compounds are formed by the electrostatic attraction between positively charged cations and negatively charged anions, resulting in stable and useful materials.
The empirical formulas and names of the ionic compounds formed from the given cations and anions are: K B r O 4 (potassium perbromate), N a N O 2 (sodium nitrite), and K B r O (potassium hypobromite).
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