$HBr+KOH \rightarrow KBr+H_2 O$
In this reaction, the acid is
A. HBr
B. KOH
C. KBr
D. $H _2 O$
Answer (2)
Identify that an acid donates a proton ( H + ).
Recognize that H B r donates a proton in the reaction.
Conclude that H B r is the acid.
The acid in the reaction is H B r .
Explanation
Understanding the Reaction We are given the chemical reaction: H B r + K O H → K B r + H 2 O . The question asks us to identify the acid in this reaction.
Identifying the Acid Recall that an acid is a substance that donates a proton ( H + ). In this reaction, hydrobromic acid ( H B r ) donates a proton to potassium hydroxide ( K O H ) to form potassium bromide ( K B r ) and water ( H 2 O ).
Conclusion Therefore, the acid in this reaction is H B r .
Examples
Acids and bases are fundamental in chemistry and play a crucial role in many everyday applications. For example, the human body uses hydrochloric acid (HCl) in the stomach to digest food. In agriculture, farmers use acids and bases to control soil pH, which affects plant growth. In the production of batteries, acids like sulfuric acid ( H 2 S O 4 ) are used as electrolytes to facilitate the flow of electrical current. Understanding acid-base reactions is essential for various industrial processes, environmental management, and even cooking, where acids like vinegar (acetic acid) are used to preserve food and enhance flavors.
In the reaction H B r + K O H → K B r + H 2 O , the acid is identified as H B r because it donates a proton to the base K O H . Therefore, the correct answer is H B r .
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