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Homework Help: Stoichiometry of a reaction

  1. Sep 26, 2010 #1
    1. The problem statement, all variables and given/known data

    sulfuric acid dissolves aluminum metal according to
    2 Al(s) + 3 H2SO4 ---- Al2(SO4)3 (aq) + 3 H2

    find minimum mass of H2SO4 in g if you wanted to dissolved aluminum block with mass of 15.2 g
    2. Relevant equations

    see above

    3. The attempt at a solution
    15.2 g Al x 1/26.98g x im confused about molar ratios what do i use? x 98.09 g H2So4

    could someone help me with molar ratios i dont understand what to multiply by
  2. jcsd
  3. Sep 27, 2010 #2


    User Avatar

    Staff: Mentor

    Look at the reaction equation - how many moles of acid needed for 2 moles of aluminum?
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