Choose the products that complete the reaction. The chemical equation may not be balanced. [tex]$NaHCO _3+ HC _2 H _3 O _2 \rightarrow$[/tex] ? A. [tex]$NaC _2 H _3 O _2+ H _2 O$[/tex] B. [tex]$NaC _2 H _3 O _2+ CO _2+ H _2 O$[/tex] C. [tex]$NaC _2 H _3 O _2+ H _2$[/tex]
Answer (2)
Sodium bicarbonate reacts with acetic acid in an acid-base reaction.
Acetic acid donates a proton to bicarbonate, forming carbonic acid.
Carbonic acid decomposes into carbon dioxide and water.
Sodium ion combines with acetate ion to form sodium acetate, so the products are N a C 2 H 3 O 2 + C O 2 + H 2 O . The final answer is N a C 2 H 3 O 2 + C O 2 + H 2 O .
Explanation
Problem Analysis We are given the reaction between sodium bicarbonate ( N a H C O 3 ) and acetic acid ( H C 2 H 3 O 2 ). We need to identify the products of this reaction from the given options.
Reaction Mechanism Sodium bicarbonate is a base, and acetic acid is an acid. This is an acid-base reaction. Acetic acid will donate a proton ( H + ) to sodium bicarbonate. Sodium bicarbonate will dissociate into sodium ( N a + ) and bicarbonate ( H C O 3 − ). The bicarbonate ion will react with the proton to form carbonic acid ( H 2 C O 3 ). Carbonic acid is unstable and decomposes into carbon dioxide ( C O 2 ) and water ( H 2 O ). The sodium ion will combine with the acetate ion ( C 2 H 3 O 2 − ) to form sodium acetate ( N a C 2 H 3 O 2 ).
Products Identification Therefore, the products of the reaction are sodium acetate, carbon dioxide, and water. The balanced reaction is: N a H C O 3 + H C 2 H 3 O 2 → N a C 2 H 3 O 2 + C O 2 + H 2 O
Final Answer Comparing the products with the given options, we find that the correct option is N a C 2 H 3 O 2 + C O 2 + H 2 O .
Examples
This reaction is commonly observed when baking. Baking soda ( N a H C O 3 ) reacts with an acid (like vinegar, H C 2 H 3 O 2 ) to produce carbon dioxide gas, which causes the dough to rise. The other products, sodium acetate and water, are also formed but are less noticeable in the baking process. Understanding this reaction helps bakers control the texture and volume of baked goods.
The reaction between sodium bicarbonate and acetic acid produces sodium acetate, carbon dioxide, and water. The correct answer is option B: N a C 2 H 3 O 2 + C O 2 + H 2 O .
;
