Wednesday, 1 May 2013

2.11 understand the difference between hydrogen chloride gas and hydrochloric acid

Hydrogen chloride gas is HCl

Hydrochloric acid is hydrogen chloride dissolved in water. The two ions become detached leaving Cl- and H+ ions. H+ is acidic, hence the term acid.

11 comments:

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  2. I don't think this helps me understand the difference.

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    1. hydrochorlic acid is dissolved HCl in water, while HCl gas is HCL itself.

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  3. The hydrogen atoms cannot dissociate from the molecules when a gas. Meaning that there are no H+ ions present, so it does not behave like an acid.
    However, when in aqueous form the hydrogen atoms can dissociate from the molecules. Meaning that H+ ions are present and so it behaves like an acid.

    Hope this cleared up any confusion :)

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  6. Also got A* in all my mocks and the science were a big help because of this page. I basically wrote down these notes and used CGP book guide and revised them by sticking them round house and placing them in places I go regularly so its easy.

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  7. Also got A* in all my mocks and the science were a big help because of this page. I basically wrote down these notes and used CGP book guide and revised them by sticking them round house and placing them in places I go regularly so its easy.

    ReplyDelete