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Homework Help: Arrhenius Acid Definition

  1. Dec 1, 2006 #1
    An Arrhenius acid
    a) in an ionic compound that contains hydrogen atoms
    b) produces an aqueous solution whose pH is greater than 7
    c) releases hydrogen ions in aqueous solution
    d) is always a neutral molecule

    I know that c) is true and d) is false. However, I don't know if a) and b) are within the definition of Arrhenius acid. My guess is that only c) is true. Can anyone point me in the right direction?
  2. jcsd
  3. Dec 1, 2006 #2
    According to the Arrhenius definition, an acid is any substance, which when dissolved in water, tends to increase the amount of H+

    so my guess would be that C is always true, the others aren't necessarily true.
  4. Dec 2, 2006 #3
    Yes, C is correct by defintion.

    a is false because there are some ionic compounds that contain hydrogen atoms and are not acids- ie. NH4NO3, NaHCO3

    b is false because >7 pH is a base

    d wouldn't be an acid or a base
  5. Dec 2, 2006 #4
    Thank you. I was trying to think of things to disprove the other answers to validate my answer :)
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