1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Molar Ratios

  1. Feb 16, 2006 #1
    Can I use molar ratios for gasses, solids, and aqueous solutions all in one equation?

    For instance: Mg(s) + 2 HCL(aq) -> MgCl2(aq) + H2(g)

    Can I say that if i had 2 moles of Mg I would have 2 moles of H2. Does this trick have anything to do with Amedeo Avogadro?
  2. jcsd
  3. Feb 16, 2006 #2


    User Avatar
    Science Advisor

    Yes, you can do that.

    In the reaction you gave,
    Mg(s) + 2 HCL(aq) -> MgCl2(aq) + H2(g)
    You can see that there is a 1:1 ratio for every mole of Mg reacted to Hydrogen gas produced. So if two moles of Mg were to react, 2 moles of H2 would be produced.
  4. Feb 16, 2006 #3
    Thanks man.

    Does this have anything to do with Avogadro's hypothesis?
    Last edited: Feb 16, 2006
  5. Feb 16, 2006 #4


    User Avatar
    Science Advisor

    The coeffients in the reaction are meant to show the ratio of each substance being reacted/produced.
    The coeffients could mean the number of moles but they could also mean the number of individual atoms/molecules too.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Molar Ratios
  1. Molarity notation (Replies: 17)

  2. Molar mass (Replies: 7)

  3. Molality and molarity (Replies: 2)

  4. Molar Enthalpy (Replies: 2)

  5. Molar Absorptivity (Replies: 1)