Lab_Alka Seltzer with data.docx - Lab: Alka Seltzer...

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Lab: Alka SeltzerIntroduction:The extent of a chemical reaction is determined by the amount of reacting materials, or reactants,present in the reacting system. Reagents are generally not mixed in exact amounts needed for the reaction totake place; there is usually one of the reacting materials added in excess. The excess reagent, usually a non-critical reagent or an inexpensive material, is used to insure that the entire critical reagent is used up so thatthere will be a maximum amount of product formed. Also, an excess of one reactant can cause the overallreaction to take place at a faster rate. Once the critical reactant is used up, the reaction will stop. That criticalreactant is called thelimiting reagent, that is, it is the reactant in the chemical reaction that is used up first.Alka Seltzer, and similar over-the-counter combination antacid and pain relief medications, containaspirin (acetylsalicylic acid), citric acid, and NaHCO3as the active ingredients. This medication is designed tobe taken by dissolving it in water before ingesting. The carbon dioxide, from the reaction, escapes into theatmosphere and results in a weight loss from the total mass of the reactants. Using the loss in mass, one cancalculate the amount of sodium bicarbonate reacted, and determine the percent by mass of NaHCO3containedin Alka Seltzer tablets.

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Term
Summer
Professor
NoProfessor
Tags
Reagent, sodium bicarbonate, Alka Seltzer Tablets

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