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 | $Na ^{+}$ | $Cl ^{-}$ |
| $MnI _3$ | | |
| $MnBr _2$ | | |
| $Ag _2 S$ | | |
| $CuCl _2$ | | |
Answer (2)
Identify the cation and anion in M n I 3 : M n 3 + and I − .
Identify the cation and anion in M n B r 2 : M n 2 + and B r − .
Identify the cation and anion in A g 2 S : A g + and S 2 − .
Identify the cation and anion in C u C l 2 : C u 2 + and C l − .
Explanation
Problem Analysis We need to complete the table by identifying the cation and anion for each ionic compound. The goal is to determine the correct ionic charges that result in a neutral compound.
Determining Ions for M n I 3 For M n I 3 , we know that iodine (I) typically has a -1 charge. Since there are three iodine atoms, the total negative charge is -3. To balance this, manganese (Mn) must have a +3 charge. Therefore, the cation is M n 3 + and the anion is I − .
Determining Ions for M n B r 2 For M n B r 2 , bromine (Br) typically has a -1 charge. With two bromine atoms, the total negative charge is -2. Manganese (Mn) must have a +2 charge to balance this. Thus, the cation is M n 2 + and the anion is B r − .
Determining Ions for A g 2 S For A g 2 S , sulfur (S) typically has a -2 charge. To balance this, the two silver (Ag) atoms must collectively have a +2 charge, meaning each silver atom has a +1 charge. Therefore, the cation is A g + and the anion is S 2 − .
Determining Ions for C u C l 2 For C u C l 2 , chlorine (Cl) typically has a -1 charge. With two chlorine atoms, the total negative charge is -2. Copper (Cu) must have a +2 charge to balance this. Thus, the cation is C u 2 + and the anion is C l − .
Final Answer Here's the completed table:
ionic compound
cation
anion
NaCl
N a +
C l −
M n I 3
M n 3 +
I −
M n B r 2
M n 2 +
B r −
A g 2 S
A g +
S 2 −
C u C l 2
C u 2 +
C l −
Examples
Understanding ionic compounds is crucial in various fields. For instance, in environmental science, knowing the composition of salts helps in assessing water quality and soil salinity. In medicine, understanding ionic balance is vital for drug delivery and maintaining cellular functions. In materials science, the properties of ionic compounds are exploited to create new ceramics and electrolytes for batteries. By mastering the basics of ionic compounds, you unlock a deeper understanding of the world around you and pave the way for exciting discoveries and innovations.
The ions for the compounds are as follows: MnI₃ has M n 3 + and I − ; MnBr₂ has M n 2 + and B r − ; Ag₂S has A g + and S 2 − ; CuCl₂ has C u 2 + and C l − .
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