Which is an Arrhenius Acid?

#H_2SO_4#
#LiOH#
#NH_2CH_3#
#CH_3CH_3#

1 Answer
Kayla
Aug 27, 2016

#H_2SO_4#

Explanation:

Sulfuric acid (#H_2SO_4#) is an Arrhenius acid because it has the ability to donate one of its hydrogen ions
(#H^(+)#).

By definition an Arrhenius acid is any substance that generates hydrogen ions in aqueous solution.

Here's an example of a general Arrhenius acid:
web.physics.ucsb.edu

  • #HA# is an acid because it dissociates in water to produce hydrogen ions #H^(+)# and the base #A^(-)#.

However, LiOH is not an Arrhenius acid because it is a strong base and it dissociates almost completely in solution; it has the ability to produce hydroxide ions in solution:
#color(white)(aaaaaaaaa) LiOH rarr Li^(+) + OH^(-)#

  • #CH_3NH_2# (methylamine) is a base and it cannot give off hydrogen ions.

  • #CH_3CH_3# (ethane) is a gaseous hydrocarbon and it will not give off hydrogen ions.

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