what happens to Br-,SO42- and CO32- anions when its sodium salt is treated with
(1) NH3 and BaCl2 and
(2) HNO3 and AgNO3 solutions. Give the formulas of the products formed.
To determine what happens to Br-, SO42-, and CO32- anions when treated with different solutions, we need to consider the reactions they can undergo. Let's go through each scenario:
(1) NH3 and BaCl2 solution:
When Br-, SO42-, and CO32- anions react with NH3 (ammonia) and BaCl2 (barium chloride) solutions, they can undergo different reactions based on their individual properties.
Br- (Bromide ion):
When Br- reacts with NH3 and BaCl2, no reaction occurs since Br- is a halide ion and does not react with ammonia or barium chloride.
SO42- (Sulfate ion):
When SO42- reacts with NH3 and BaCl2, no reaction occurs since SO42- is a stable anion and does not react with ammonia or barium chloride.
CO32- (Carbonate ion):
When CO32- reacts with NH3 and BaCl2, a reaction known as a precipitation reaction occurs. Ba2+ from BaCl2 reacts with CO32- to form an insoluble white solid called BaCO3. The reaction can be represented as follows:
Ba2+ (aq) + CO32- (aq) -> BaCO3 (s)
Therefore, in this scenario, the only product formed is BaCO3 (barium carbonate).
(2) HNO3 and AgNO3 solution:
When Br-, SO42-, and CO32- anions react with HNO3 (nitric acid) and AgNO3 (silver nitrate) solutions, they can also undergo different reactions based on their individual properties.
Br- (Bromide ion):
When Br- reacts with HNO3 and AgNO3, no reaction occurs since Br- is a halide ion and does not react with nitric acid or silver nitrate.
SO42- (Sulfate ion):
When SO42- reacts with HNO3 and AgNO3, no reaction occurs since SO42- is a stable anion and does not react with nitric acid or silver nitrate.
CO32- (Carbonate ion):
When CO32- reacts with HNO3 and AgNO3, a reaction known as a double displacement reaction occurs. Ag+ from AgNO3 reacts with CO32- to form an insoluble white solid called Ag2CO3. Additionally, nitric acid HNO3 reacts with CO32- to form carbonic acid H2CO3, which is unstable and decomposes to form water (H2O) and carbon dioxide (CO2). The reactions can be represented as follows:
2Ag+ (aq) + CO32- (aq) -> Ag2CO3 (s)
HNO3 (aq) + CO32- (aq) -> H2CO3 (aq) -> H2O (l) + CO2 (g)
Therefore, in this scenario, the products formed are Ag2CO3 (silver carbonate), H2O (water), and CO2 (carbon dioxide).
To summarize the products formed in each scenario:
(1) NH3 and BaCl2 solution:
Br- (No reaction), SO42- (No reaction), CO32- (BaCO3)
(2) HNO3 and AgNO3 solution:
Br- (No reaction), SO42- (No reaction), CO32- (Ag2CO3, H2O, CO2)