Do all acids contain hydrogen?

Answer 1

In Arrhenius as well as Bronsted/Lowry definitions of an acid, yes: it is defined as the hydrogen or proton donor (H+) and so it must have the ability to give it up.
However, Lewis's definition states that an acid is an electron pair acceptor, therefore BF3 is an acid, as well as some other metallic elements that can do funky things with their orbitals.

Answer 2

All Acids Contain

Answer 3

For the best answers, search on this site https://shorturl.im/awVOf

Yes and no. How's that for a definitive answer? Hydrochloric acid solution is a mixture of water and hydrogen chloride gas, HCl. When HCl gas dissolves in water a solution of hydrochloric acid is produced. A solution of HCl exists as a large collection of water molecules, plus some hydrogen ions (H+) and chloride ions (Cl-) which are not connected to each other as they were in gaseous HCl. Obviously HCl contains the element hydrogen, but not hydrogen gas, which is defined as H2(g). Where it gets interesting is when hydrochloric acid reacts with a metal. The H+ ions collide with the metal atoms and exchange an electron, making a metal ion and hydrogen atoms. The hydrogen atoms combine to make H2 which comes off as a gas. ============= Follow up ============== Joshua, I'm sure, has a typo here, "...while the chloride ions react with zinc to form zinc sulphate. (sic)". There's no zinc sulfate. And there's no zinc chloride. You often see a chemical equation for a reaction such as this written as: Zn + 2HCl --> ZnCl2 + H2 And while it is true that there is hydrogen gas being produced, there are no molecules of zinc chloride being produced. This is why the ionic equation is so very, very much more useful, because it shows how the various substances actually exist in solution. Since HCl is a strong acid, and as such completely dissociates into ions, we can write: Zn(s) + 2H+ + 2Cl- --> Zn^2+ + 2Cl- + H2(g) You will notice that the chloride ions did absolutely nothing, and they didn't combine with zinc to make zinc chloride. In fact, if we discount the non-reactivity of the chloride ion, it leaves us with the "net ionic equation": Zn(s) + 2H+ --> Zn2+ + H2(g)

Answer 4

All Arrhenius acids (H3O+), or Bronsted acids (proitons) do. But Lewis acids (BF3, AlCl3) do not.

Answer 5

Yes. It's the H+ ions that form the acidity.

Answer 6

Yup.