Background information-
When Alka-Seltzer tablets are dissolved in water, bicarbonate forms , which in turn reacts with hydrogen (from citric acid) to form water and carbon dioxide gas.Alka-Seltzer is a medication that works as a pain reliever and an antacid.The pain reliever used is aspirin and the antacid used is baking soda, or sodium bicarbonate. Introduction- Some chemical reactions occur instantly while other occur very slowly. Most reaction times vary throughout science over a period of time. My SRP experiment is aimed towards finding the effect on the time it takes for Alka-seltzer tables to completely dissolve based on different reactant particle size. I will be exploring the time difference for the tablet to dissolve when it is whole, cut in half, cut in quarters and in powdered form. This experiment explores what effect the size of the reactant particle has on the speed of a chemical reaction in this case the chemical reaction is the production of carbon dioxide gas by an Alka-Seltzer tablet. Aim- The aim is to measure the reactant time based on reactant particle size. Hypothesis- Do you think changing the particle size will have a measurable effect on the chemical reaction rate? My hypothesis is that the tablets which are broken in smaller pieces will dissolve much faster. Therefore i believe that the powered tablet will have the fastest dissolving time followed by the quartered tablet then the half. Whereas the whole tablet will have the slowest reactant time. Risk assessment 1.When cutting the tablet, must use caution as a knife will be used 2.When hammering the tablet into a powdered form avoid hammering one of your fingers. |