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Posted by on Thursday, February 21, 2013 at 10:48am.

When an acid reacts with a metal such as zinc, whats released? Where does the product come from? I answered: a gas hydrogen is released and it comes from the bubbles formed when an acid is added to a metal' is the 2nd part of the q correct??

  • Chemistry :) simple question - , Thursday, February 21, 2013 at 12:03pm

    you are correct, but where do the bubbles come from?

    They come from the water molecules. The metal replaces one of the hydrogen atoms, and the displaced hydrogen forms bubbles.

    Thus, the metal which was separate combines to form a hydroxide, leaving the hydrogen separate, and away it goes.

  • Chemistry :) simple question - , Thursday, February 21, 2013 at 12:06pm

    The above assumes that the acid consists of an aqueous solution. HCl reacts with Na to produce NaCl and Cl2 gas, not hydrogen. In fact, I guess my answer is actually wrong; a gas atom is displaced, but it's not necessarily hydrogen.

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