Which of the following is an example of an Arrhenius acid?
A. [tex]$BF _3$[/tex]
B. [tex]$NH _3$[/tex]
C.
D. NaOH
Answer (2)
An Arrhenius acid increases H^+ ion concentration in water. Among the given choices, option C, if it refers to hydrochloric acid (HCl), is the correct example of an Arrhenius acid as it releases H^+ ions when dissolved in water. The other options do not meet the criteria for an Arrhenius acid.
;
Arrhenius acids increase H + concentration in water.
B F 3 is a Lewis acid, N H 3 and NaOH are bases.
Assuming option C is HCl, it dissociates into H + and C l − .
Therefore, the answer is C (assuming it is HCl).
Explanation
Understanding Arrhenius Acids We need to identify which of the given options is an Arrhenius acid. An Arrhenius acid is a substance that increases the concentration of H + ions when dissolved in water.
Analyzing the Options Let's analyze each option: A. B F 3 : Boron trifluoride is a Lewis acid, which means it can accept an electron pair, but it does not release H + ions in water. So, it's not an Arrhenius acid. B. N H 3 : Ammonia is a weak base. It accepts a proton ( H + ) from water to form N H 4 + and O H − . So, it's not an Arrhenius acid. C. : This option is incomplete and doesn't provide a chemical formula, so we cannot determine if it's an Arrhenius acid. D. NaOH: Sodium hydroxide is a strong base. It dissociates in water to form N a + and O H − ions. So, it's not an Arrhenius acid.
Identifying the Arrhenius Acid Since option C is incomplete, we need to consider a common acid. A common Arrhenius acid is hydrochloric acid, HCl. When HCl dissolves in water, it dissociates into H + and C l − ions, thus increasing the concentration of H + ions. Therefore, HCl is an Arrhenius acid. Assuming option C is HCl, then option C is the correct answer.
Examples
Arrhenius acids are fundamental in many chemical processes, including industrial production, laboratory research, and even biological functions. For example, hydrochloric acid (HCl), an Arrhenius acid, is used in the production of various chemicals and in the digestion process in the stomach. Understanding Arrhenius acids helps in controlling chemical reactions and predicting their outcomes.
