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Posted by on Friday, February 17, 2012 at 1:05pm.

If a chemist has a stock solution of HBr that is 10.0 M and would like to make 450.0 mL of 3.0 M HBr, how would he or she do it?

  • Chemistry - , Friday, February 17, 2012 at 4:01pm

    How many moles do you need in the final solution? That is M x L = x moles
    You want that many mols of the stock solution. You know is it 10 M; therefore, 10 M x ?L = x moles.
    Solve for ?L.

    You may be more comfortable using the dilution formula.
    c1v1 = c2v2
    c= concn
    v = volume

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