What best describes what happens when an acid such as HCl is mixed with water?
A) The proton chemically bonded to the chlorine is transferred to a water molecule and forms a chloride ion and a hydronium ion.
B) A proton from the chlorine nucleus is ejected and captured by a water molecule to form a negatively charged HCl and a new hydronium ion.
C) A hydroxide ion from the water is transferred to the HCl molecule to form a proton and hydronium ion.
D) HCl is not an acid.
E) none of the above
Answer: A
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