2HCl+Pb(NO3)2---> PbCl2 (s)+2HNO3
Can you please tell why this is not an acid base reaction?
Because Pb(NO3)2 is a salt and PbCl2 is a ppt. This is a double displacement reaction which is spontaneous because PbCl2 is insoluble. The insoluble ppt of PbCl2 drives the reaction forward (Le Chatelier's Principle) and the reaction proceeds to completion.
Other reasons for rxns going to completion:
a. ppt forms
b. gas formed
c. slightly ionized material formed.
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The given chemical equation represents a double displacement or precipitation reaction, not an acid-base reaction. In an acid-base reaction, there would be a transfer of protons (H+ ions) from an acid to a base, resulting in the formation of a salt and water. However, in the given equation, there is no water formed, and the products are a solid salt (PbCl2) and nitric acid (HNO3).
In this equation, hydrochloric acid (HCl) reacts with lead(II) nitrate (Pb(NO3)2) to produce solid lead(II) chloride (PbCl2) and nitric acid (HNO3). This is a double displacement reaction where the chloride ions (Cl-) from hydrochloric acid combine with the lead(II) ions (Pb2+) from lead(II) nitrate to form solid lead(II) chloride, while the nitrate ions (NO3-) from lead(II) nitrate combine with the hydrogen ions (H+) from hydrochloric acid to form nitric acid.
Therefore, this reaction is not considered an acid-base reaction but rather a precipitation or double displacement reaction.
To determine whether a chemical equation represents an acid-base reaction, we need to identify the presence of acid and base species. In the given chemical equation:
2HCl + Pb(NO3)2 → PbCl2 (s) + 2HNO3
HCl is a strong acid, whereas Pb(NO3)2 is a salt (Pb2+ + 2NO3-). HNO3 is also an acid, and PbCl2 is a solid compound.
In this equation, we see that HCl and HNO3 are both acids, and Pb(NO3)2 is a salt that dissociates into cations (Pb2+) and anions (NO3-). However, there are no clear indications of a base participating in the reaction.
An acid-base reaction involves the transfer of a proton (H+) from an acid to a base. In this case, since there is no clear base species present, we can conclude that the given chemical equation is not an acid-base reaction.
To summarize, the absence of a base species in the reaction indicates that it is not an acid-base reaction.