Complete the table below by writing the symbols for the cation and anion that make up each ionic compound. The first row has been completed for you.
| Ionic compound | cation | anion |
| -------------- | ------ | ----- |
| NaCl | $Na { }^{+}$ | $Cl ^{-}$ |
| $V _2( SO _4)_3$ | | |
| $VF _2$ | | |
| $Fe ( NO _3)_3$ | | |
| $NH _4 I$ | | |
Answer (1)
Identify the cation and anion for V 2 ( S O 4 ) 3 : V 3 + and S O 4 2 − .
Identify the cation and anion for V F 2 : V 2 + and F − .
Identify the cation and anion for F e ( N O 3 ) 3 : F e 3 + and N O 3 − .
Identify the cation and anion for N H 4 I : N H 4 + and I − .
The completed table is provided above.
Explanation
Understanding the Problem We need to identify the cation and anion for each of the given ionic compounds: V 2 ( S O 4 ) 3 , V F 2 , F e ( N O 3 ) 3 , and N H 4 I .
Identifying Ions in V 2 ( S O 4 ) 3 For V 2 ( S O 4 ) 3 , the cation is Vanadium(III) ion and the anion is Sulfate ion. The symbols with charges are V 3 + and S O 4 2 − .
Identifying Ions in V F 2 For V F 2 , the cation is Vanadium(II) ion and the anion is Fluoride ion. The symbols with charges are V 2 + and F − .
Identifying Ions in F e ( N O 3 ) 3 For F e ( N O 3 ) 3 , the cation is Iron(III) ion and the anion is Nitrate ion. The symbols with charges are F e 3 + and N O 3 − .
Identifying Ions in N H 4 I For N H 4 I , the cation is Ammonium ion and the anion is Iodide ion. The symbols with charges are N H 4 + and I − .
Final Answer Here's the completed table:
Ionic compound
cation
anion
NaCl
N a +
C l −
V 2 ( S O 4 ) 3
V 3 +
S O 4 2 −
V F 2
V 2 +
F −
F e ( N O 3 ) 3
F e 3 +
N O 3 −
N H 4 I
N H 4 +
I −
Examples
Understanding ionic compounds is crucial in various fields. For instance, in agriculture, fertilizers like ammonium nitrate ( N H 4 N O 3 ) provide essential nutrients to plants. The ammonium ion ( N H 4 + ) and nitrate ion ( N O 3 − ) are vital for plant growth. Similarly, in medicine, compounds like potassium iodide ( K I ) are used to treat thyroid problems, where the iodide ion ( I − ) plays a key role. In environmental science, understanding the composition of salts helps in managing water quality and soil salinity.
