AgNO3 + NaCl -> AgCl + NaNO3
Which statement about this reaction is FALSE?
A. This is one kind of metathesis reaction, where molecules exchange atoms.
B. This reaction produces a gas.
C. This is a precipitation reaction.
D. The equation is balanced.
What don't you understand about this? The answer is B. A, C, D are true.
To determine which statement about this reaction is false, let's analyze each statement one by one:
A. This is one kind of metathesis reaction, where molecules exchange atoms.
Metathesis reactions involve the exchange of ions between two compounds, resulting in the formation of new compounds. In this reaction, AgNO3 and NaCl exchange ions to produce AgCl and NaNO3. Therefore, statement A is true.
B. This reaction produces a gas.
Looking at the equation AgNO3 + NaCl -> AgCl + NaNO3, we can observe that no gas is produced. The reactants and products are all in the form of aqueous solutions. Therefore, statement B is false.
C. This is a precipitation reaction.
Precipitation reactions involve the formation of a solid (precipitate) when two aqueous solutions are mixed. In this case, AgCl is a precipitate that forms when AgNO3 and NaCl are combined. Therefore, statement C is true.
D. The equation is balanced.
Balancing a chemical equation ensures that the number of atoms of each element is the same on both sides of the equation. Let's balance the equation:
AgNO3 + NaCl -> AgCl + NaNO3
First, we need to balance the number of silver (Ag) atoms. There is one Ag on each side of the equation. Next, let's balance nitrogen (N) atoms. There is one N on each side. Finally, balance the chlorine (Cl) and sodium (Na) atoms. There is one Cl and one Na on each side. The equation is indeed balanced, so statement D is true.
In conclusion, the false statement about this reaction is statement B. This reaction does not produce a gas.