What else is produced during the replacement reaction of silver nitrate?
[tex]2 AgNO_3+K_2 SO_4 \rightarrow Ag_2 SO_4+ KNO _3[/tex]
A. [tex]2 KNO _3[/tex]
B. [tex]K _2[/tex]
C. [tex]2 AgNO _3[/tex]
Answer (2)
Balance the chemical equation: 2 A g N O 3 + K 2 S O 4 → A g 2 S O 4 + X .
Count the atoms of each element on the reactant side: Ag: 2, N: 2, O: 6, K: 2, S: 1.
Count the atoms of each element on the product side (excluding the unknown product): Ag: 2, S: 1, O: 4.
Determine the number of atoms of each element that must be present in the unknown product to balance the equation: K: 2, N: 2, O: 2. The unknown product is 2 K N O 3 .
Explanation
Understanding the Reaction The chemical reaction provided is a replacement reaction between silver nitrate ( A g N O 3 ) and potassium sulfate ( K 2 S O 4 ). The products are silver sulfate ( A g 2 S O 4 ) and an unknown compound. Our goal is to identify the unknown compound by balancing the chemical equation.
Setting up the Equation The given reaction is: 2 A g N O 3 + K 2 S O 4 → A g 2 S O 4 + X We need to find what 'X' is.
Counting Atoms Let's count the atoms of each element on both sides of the equation:
Reactants (Left side):
Silver (Ag): 2
Nitrogen (N): 2
Oxygen (O): 6 (from 2 A g N O 3 )
Potassium (K): 2
Sulfur (S): 1
Products (Right side, excluding X):
Silver (Ag): 2
Sulfur (S): 1
Oxygen (O): 4 (from A g 2 S O 4 )
Now, let's determine what elements are missing on the product side and how many of each are needed to balance the equation.
Identifying the Missing Compound Comparing the number of atoms on both sides, we see that we need:
Potassium (K): 2
Nitrogen (N): 2
Oxygen (O): 2 (6 on the left - 4 on the right = 2)
So, the missing compound 'X' must contain 2 Potassium (K) atoms, 2 Nitrogen (N) atoms, and 2 Oxygen (O) atoms. This means 'X' is 2 K N O 3 .
Final Answer Therefore, the balanced chemical equation is: 2 A g N O 3 + K 2 S O 4 → A g 2 S O 4 + 2 K N O 3 The other product produced during the replacement reaction is 2 K N O 3 .
Examples
Replacement reactions are commonly used in various applications, such as water purification, where unwanted ions are replaced with harmless ones. For example, in some water filters, calcium and magnesium ions (which cause hardness) are replaced with sodium ions. This process involves a chemical reaction similar to the one described, where ions are exchanged between different compounds to achieve a desired outcome.
The other product produced during the reaction of silver nitrate and potassium sulfate is 2 moles of potassium nitrate (2 KNO3). This can be confirmed by balancing the chemical equation. Therefore, the correct option is A: 2 KNO3.
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