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how much of each of the following substances would you add to water to prepare 1.20L of a .85M solution? (H2SO4 from "concentrated" (18M) sulfuric acid) ? I am stuck on how to work this one out. thanks

  • chemistry -

    Two ways to do it.
    18 M = 18 mols per liter.
    You want 1.20 L x 0.85 M = 1.02 mols.
    Then L x M = mols.
    L x 18 = 1.02
    L = ?? of H2SO4.

    OR you can use the dilution formula.
    L x M = L x M
    L x 18 M = 1.20 L x 0.85 M
    solve for Liters of H2SO4 @ 18 M.

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