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Chemistry

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If a tablet of TUMS contains 500mg of the active ingredient, CaCO3, how many tablets would it take to neturalize the 1.5g of HCl?


From balanced equation: CaCO3 + 2HCl = CaCl2 + H2O + CO2

  • Chemistry -

    500 mg = 0.500g
    mols HCl = g/molar mass = 1.5/30.0416.5 = approximately 0.041 but you need to do it more accurately.
    mols CaCO3 = 0.041 mols HCl x (1 mol CaCO3/2 mol HCl) = 0.041 x 1/2 = approx 0.02 mols CaCO3.
    g CaCO3 = mols x molar mass = approx 0.02 x 100 = approx 2 g CaCO3.
    Then (0.500 g CaCO3/tab) x # tab = 2g.
    Solve for # tabs.

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