CHM110H5 Lecture Notes - Limiting Reagent, Tums, Ammonia

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14 Jun 2014
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An increase of hcl in part a of the experiment will not affect the result of the experiment because the metal that will react with the hcl will act as the limiting reactant instead of hcl. This reaction limits the volume of hydrogen that can be produced. Conversely, if the concentration of hcl is reduced (ex. diluting hcl in water) then the result of the experiment would be affected. The decrease in hcl would cause hcl to be the limiting reactant. This reaction will limit the amount of h2 and h2o that will produced in this experiment. If h2so4 was used instead of hcl in part a of the experiment then volume of h2 that is produced will not change. H2so4 is a strong acid, much like hcl, and turns into a weak acid when one of the h+ ions dissociates from it, which happens readily in aqueous solution.

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